SizeWidthToFit()

I would like to use the command sizeWidthToFit, in order to have the columns of my JTable
large enough to show the column headers, but I have some problems with it.
I'm using this code:
private int minimumColumnWidth = 200;
private void setColumnSize(javax.swing.JTable t) {
javax.swing.table.TableColumnModel m = t.getColumnModel();
java.util.Enumeration i = m.getColumns();
while (i.hasMoreElements()) {
javax.swing.table.TableColumn c = (javax.swing.table.TableColumn)i.nextElement();
c.setPreferredWidth(minimumColumnWidth);
//c.sizeWidthToFit();
As you can see, now the width is fixed to 200, because the command:
c.sizeWidthToFit();
doesn't work.
Can you help me finding a solution?
Thanks in advance,
Giorgio

Hello!
I have written a function that resizes a table so that the column headers and the cell values fitt in their cells!
You can easily modify it for your needs!
Here is the code:
 private void computeColumnWidths()
 //horizontal spacing
 int hspace = 6;
 TableModel model = table.getModel();
 //rows no
 int cols = model.getColumnCount();
 //columns no
 int rows = model.getRowCount();
 //witdth vector
 int w[] = new int[ model.getColumnCount() ];
 //computes headers widths
 for( int i=0; i<cols; i++ )
 w[i] = (int)table.getDefaultRenderer( String.class ).
 getTableCellRendererComponent( table, table.getColumnName( i ), false, false, -1, i ).
 getPreferredSize().getWidth() + hspace;
 //check if cell values fit in their cells and if not
 //keep in w[i] the necessary with
 for( int i=0; i<rows; i++ )
 for(int j=0; j<cols; j++ )
 Object o = model.getValueAt( i, j );
 int width = 0;
 if ( o != null )
 width = (int)table.getCellRenderer( i, j ).
 getTableCellRendererComponent( table, o, false, false, i, j ).
 getPreferredSize().getWidth() + hspace;
 if( w[j] < width )
 w[j] = width;
 TableColumnModel colModel = table.getColumnModel();
 //and finnaly setting the column widths
 for(int i=0; i<cols; i++ )
 colModel.getColumn( i ).setPreferredWidth( w[i] );
 }where table is a JTable member of my class

Similar Messages

Can anyone help me, please(again)

Hello :
I am sorry that my massage is not clearly.
Please run my coding first, and get some view from my coding. you can see somes buttons are on the frame.
Now I want to click the number 20 of the buttons, and then I want to display a table which from the class TableRenderDemo to sit under the buttons. I added some coding for this problem in the class DrawClalendar, the coding is indicated by ??.
but it still can not see the table apear on on the frame with the buttons.
Can anyone help me to solve this problem.please
Thanks
*This program for add some buttons to JPanel
*and add listeners to each button
*I want to display myTable under the buttons,
*when I click on number 20, but why it doesn't
*work, The coding for these part are indicated by ??????????????
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.GridLayout;
public class DrawCalendar extends JPanel {
 private static DrawCalendar dC;
 private static TestMain tM;
 private static TableRenderDemo myTable;
 private static GridLayout gL;
 private static final int nlen = 35;
 private static String names[] = new String[nlen];
 private static JButton buttons[] = new JButton[nlen];
 public DrawCalendar(){
 gL=new GridLayout(5,7,0,0);
 setLayout(gL);
 assignValues();
 addJButton();
 registerListener();
 //assign values to each button
 private void assignValues(){
 names = new String[35];
 for(int i = 0; i < names.length; i++)
 names[i] = Integer.toString(i + 1);
 //create buttons and add them to Jpanel
 private void addJButton(){
 buttons=new JButton[names.length];
 for (int i=0; i<names.length; i++){
 buttons=new JButton(names[i]);
 buttons[i].setBorder(null);
 buttons[i].setBackground(Color.white);
 buttons[i].setFont(new Font ("Palatino", 0,8));
add(buttons[i]);
//add listeners to each button
private void registerListener(){
 for(int i=0; i<35; i++)
 buttons[i].addActionListener(new EventHandler());
//I want to display myTable under the buttons,
//when I click on number 20, but why it doesn't
//work
private class EventHandler implements ActionListener{
 public void actionPerformed(ActionEvent e){
 for(int i=0; i<35; i++){
//I want to display myTable under the buttons,
//when I click on number 20, but why it doesn't
//work
 if(i==20){ //???????????
 tM=new TestMain(); //???????
 tM.c.removeAll(); //??????
 tM.c.add(dC); //???????
 tM.c.add(myTable); //????
 tM.validate();
 if(e.getSource()==buttons[i]){
 System.out.println("testing " + names[i]);
 break;
*This program create a table with some data
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableColumn;
import javax.swing.DefaultCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class TableRenderDemo extends JScrollPane {
private boolean DEBUG = true;
public TableRenderDemo() {
// super("TableRenderDemo");
MyTableModel myModel = new MyTableModel();
JTable table = new JTable(myModel);
table.setPreferredScrollableViewportSize(new Dimension(700, 70));//500,70
//Create the scroll pane and add the table to it.
setViewportView(table);
//Set up column sizes.
initColumnSizes(table, myModel);
//Fiddle with the Sport column's cell editors/renderers.
setUpSportColumn(table.getColumnModel().getColumn(2));
* This method picks good column sizes.
* If all column heads are wider than the column's cells'
* contents, then you can just use column.sizeWidthToFit().
private void initColumnSizes(JTable table, MyTableModel model) {
TableColumn column = null;
Component comp = null;
int headerWidth = 0;
int cellWidth = 0;
Object[] longValues = model.longValues;
for (int i = 0; i < 5; i++) {
column = table.getColumnModel().getColumn(i);
try {
comp = column.getHeaderRenderer().
getTableCellRendererComponent(
null, column.getHeaderValue(),
false, false, 0, 0);
headerWidth = comp.getPreferredSize().width;
} catch (NullPointerException e) {
System.err.println("Null pointer exception!");
System.err.println(" getHeaderRenderer returns null in 1.3.");
System.err.println(" The replacement is getDefaultRenderer.");
comp = table.getDefaultRenderer(model.getColumnClass(i)).
getTableCellRendererComponent(
table, longValues[i],
false, false, 0, i);
cellWidth = comp.getPreferredSize().width;
if (DEBUG) {
System.out.println("Initializing width of column "
+ i + ". "
+ "headerWidth = " + headerWidth
+ "; cellWidth = " + cellWidth);
//XXX: Before Swing 1.1 Beta 2, use setMinWidth instead.
column.setPreferredWidth(Math.max(headerWidth, cellWidth));
public void setUpSportColumn(TableColumn sportColumn) {
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("Snowboarding");
comboBox.addItem("Rowing");
comboBox.addItem("Chasing toddlers");
comboBox.addItem("Speed reading");
comboBox.addItem("Teaching high school");
comboBox.addItem("None");
sportColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
DefaultTableCellRenderer renderer =
new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
sportColumn.setCellRenderer(renderer);
//Set up tool tip for the sport column header.
TableCellRenderer headerRenderer = sportColumn.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer) {
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the sport to see a list of choices");
class MyTableModel extends AbstractTableModel {
final String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
final Object[][] data = {
{"Mary ", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Chasing toddlers", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Angela", "Lih",
"Teaching high school", new Integer(4), new Boolean(false)}
public final Object[] longValues = {"Angela", "Andrews",
"Teaching high school",
new Integer(20), Boolean.TRUE};
public int getColumnCount() {
return columnNames.length;
public int getRowCount() {
return data.length;
public String getColumnName(int col) {
return columnNames[col];
public Object getValueAt(int row, int col) {
return data[row][col];
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
* Don't need to implement this method unless your table's
* editable.
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
if (col < 2) {
return false;
} else {
return true;
* Don't need to implement this method unless your table's
* data can change.
public void setValueAt(Object value, int row, int col) {
if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value
+ " (an instance of "
+ value.getClass() + ")");
if (data[0][col] instanceof Integer
&& !(value instanceof Integer)) {
//With JFC/Swing 1.1 and JDK 1.2, we need to create
//an Integer from the value; otherwise, the column
//switches to contain Strings. Starting with v 1.3,
//the table automatically converts value to an Integer,
//so you only need the code in the 'else' part of this
//'if' block.
try {
data[row][col] = new Integer(value.toString());
fireTableCellUpdated(row, col);
} catch (NumberFormatException e) {
JOptionPane.showMessageDialog(TableRenderDemo.this,
"The \"" + getColumnName(col)
+ "\" column accepts only integer values.");
} else {
data[row][col] = value;
fireTableCellUpdated(row, col);
if (DEBUG) {
System.out.println("New value of data:");
printDebugData();
private void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount();
for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + data[i][j]);
System.out.println();
System.out.println("--------------------------");
*This program for add some buttons and a table on JFrame
import java.awt.*;
import javax.swing.*;
public class TestMain extends JFrame{
private static TableRenderDemo tRD;
 private static TestMain tM;
protected static Container c;
private static DrawCalendar dC;
 public static void main(String[] args){
 tM = new TestMain();
 tM.setVisible(true);
 public TestMain(){
 super(" Test");
 setSize(800,600);
//set up layoutManager
c=getContentPane();
c.setLayout ( new GridLayout(3,1));
tRD=new TableRenderDemo();
dC=new DrawCalendar();
addItems();//add Buttons to JFrame
private void addItems(){
 c.add(dC); //add Buttons to JFrame
 //c.add(tRD); //add Table to JFrame

I think this is what you are trying to do. Your code was not very clear so I wrote my own:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import java.text.*;
public class TableButtons extends JFrame implements ActionListener
 Component southComponent;
 public TableButtons()
 JPanel buttons = new JPanel();
 buttons.setLayout( new GridLayout(5, 7) );
 Dimension buttonSize = new Dimension(20, 20);
 for (int j = 0; j < 35; j++)
 // this is a trick to convert an integer to a string
 String label = "" + (j + 1);
 JButton button = new JButton( label );
 button.setBorder( null );
 button.setBackground( Color.white );
 button.setPreferredSize( buttonSize );
 button.addActionListener( this );
 buttons.add(button);
 getContentPane().add(buttons, BorderLayout.NORTH);
 public void actionPerformed(ActionEvent e)
 JButton button = (JButton)e.getSource();
 String command = button.getActionCommand();
 if (command.equals("20"))
 displayTable();
 else
 System.out.println("Button " + command + " pressed");
 if (southComponent != null)
 getContentPane().remove( southComponent );
 validate();
 pack();
 southComponent = null;
 private void displayTable()
 String[] columnNames = {"Student#", "Student Name", "Gender", "Grade", "Average"};
 Object[][] data =
 {new Integer(1), "Bob", "M", "A", new Double(85.5) },
 {new Integer(2), "Carol", "F", "B", new Double(77.7) },
 {new Integer(3), "Ted", "M", "C", new Double(66.6) },
 {new Integer(4), "Alice", "F", "D", new Double(55.5) }
 JTable table = new JTable(data, columnNames);
 table.setPreferredScrollableViewportSize(table.getPreferredSize());
 JScrollPane scrollPane= new JScrollPane( table );
 getContentPane().add(scrollPane, BorderLayout.SOUTH);
 validate();
 pack();
 southComponent = scrollPane;
 public static void main(String[] args)
 TableButtons frame = new TableButtons();
 frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
 frame.pack();
 frame.setVisible(true);
}

Can anyone help me, please

Hello again:
Please run my coding first, and get some view from my coding.
I want to add a table(it is from TableRenderDemo) to a JFrame when I click on the button(from DrawCalendar) of the numer 20, and I want the table disply under the buttons(from DrawCalendar), and the table & buttons all appear on the frame. I added some code for this problem(in the EventHander of the DrawCalendar class), but I do
not known why it can not work.Please help me to solve this problem.
Can anyone help me, please.
Thanks.
*This program for add some buttons to JPanel
*and add listeners to each button
*I want to display myTable under the buttons,
*when I click on number 20, but why it doesn't
*work, The coding for these part are indicated by ??????????????
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.GridLayout;
public class DrawCalendar extends JPanel {
 private static DrawCalendar dC;
 private static TestMain tM;
 private static TableRenderDemo myTable;
 private static GridLayout gL;
 private static final int nlen = 35;
 private static String names[] = new String[nlen];
 private static JButton buttons[] = new JButton[nlen];
 public DrawCalendar(){
 gL=new GridLayout(5,7,0,0);
 setLayout(gL);
 assignValues();
 addJButton();
 registerListener();
 //assign values to each button
 private void assignValues(){
 names = new String[35];
 for(int i = 0; i < names.length; i++)
 names[i] = Integer.toString(i + 1);
 //create buttons and add them to Jpanel
 private void addJButton(){
 buttons=new JButton[names.length];
 for (int i=0; i<names.length; i++){
 buttons=new JButton(names[i]);
 buttons[i].setBorder(null);
 buttons[i].setBackground(Color.white);
 buttons[i].setFont(new Font ("Palatino", 0,8));
add(buttons[i]);
//add listeners to each button
private void registerListener(){
 for(int i=0; i<35; i++)
 buttons[i].addActionListener(new EventHandler());
//I want to display myTable under the buttons,
//when I click on number 20, but why it doesn't
//work
private class EventHandler implements ActionListener{
 public void actionPerformed(ActionEvent e){
 for(int i=0; i<35; i++){
//I want to display myTable under the buttons,
//when I click on number 20, but why it doesn't
//work
 if(i==20){ //???????????
 tM=new TestMain(); //???????
 tM.c.removeAll(); //??????
 tM.c.add(dC); //???????
 tM.c.add(myTable); //????
 tM.validate();
 if(e.getSource()==buttons[i]){
 System.out.println("testing " + names[i]);
 break;
*This program create a table with some data
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableColumn;
import javax.swing.DefaultCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class TableRenderDemo extends JScrollPane {
private boolean DEBUG = true;
public TableRenderDemo() {
// super("TableRenderDemo");
MyTableModel myModel = new MyTableModel();
JTable table = new JTable(myModel);
table.setPreferredScrollableViewportSize(new Dimension(700, 70));//500,70
//Create the scroll pane and add the table to it.
setViewportView(table);
//Set up column sizes.
initColumnSizes(table, myModel);
//Fiddle with the Sport column's cell editors/renderers.
setUpSportColumn(table.getColumnModel().getColumn(2));
* This method picks good column sizes.
* If all column heads are wider than the column's cells'
* contents, then you can just use column.sizeWidthToFit().
private void initColumnSizes(JTable table, MyTableModel model) {
TableColumn column = null;
Component comp = null;
int headerWidth = 0;
int cellWidth = 0;
Object[] longValues = model.longValues;
for (int i = 0; i < 5; i++) {
column = table.getColumnModel().getColumn(i);
try {
comp = column.getHeaderRenderer().
getTableCellRendererComponent(
null, column.getHeaderValue(),
false, false, 0, 0);
headerWidth = comp.getPreferredSize().width;
} catch (NullPointerException e) {
System.err.println("Null pointer exception!");
System.err.println(" getHeaderRenderer returns null in 1.3.");
System.err.println(" The replacement is getDefaultRenderer.");
comp = table.getDefaultRenderer(model.getColumnClass(i)).
getTableCellRendererComponent(
table, longValues[i],
false, false, 0, i);
cellWidth = comp.getPreferredSize().width;
if (DEBUG) {
System.out.println("Initializing width of column "
+ i + ". "
+ "headerWidth = " + headerWidth
+ "; cellWidth = " + cellWidth);
//XXX: Before Swing 1.1 Beta 2, use setMinWidth instead.
column.setPreferredWidth(Math.max(headerWidth, cellWidth));
public void setUpSportColumn(TableColumn sportColumn) {
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("Snowboarding");
comboBox.addItem("Rowing");
comboBox.addItem("Chasing toddlers");
comboBox.addItem("Speed reading");
comboBox.addItem("Teaching high school");
comboBox.addItem("None");
sportColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
DefaultTableCellRenderer renderer =
new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
sportColumn.setCellRenderer(renderer);
//Set up tool tip for the sport column header.
TableCellRenderer headerRenderer = sportColumn.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer) {
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the sport to see a list of choices");
class MyTableModel extends AbstractTableModel {
final String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
final Object[][] data = {
{"Mary ", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Chasing toddlers", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Angela", "Lih",
"Teaching high school", new Integer(4), new Boolean(false)}
public final Object[] longValues = {"Angela", "Andrews",
"Teaching high school",
new Integer(20), Boolean.TRUE};
public int getColumnCount() {
return columnNames.length;
public int getRowCount() {
return data.length;
public String getColumnName(int col) {
return columnNames[col];
public Object getValueAt(int row, int col) {
return data[row][col];
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
* Don't need to implement this method unless your table's
* editable.
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
if (col < 2) {
return false;
} else {
return true;
* Don't need to implement this method unless your table's
* data can change.
public void setValueAt(Object value, int row, int col) {
if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value
+ " (an instance of "
+ value.getClass() + ")");
if (data[0][col] instanceof Integer
&& !(value instanceof Integer)) {
//With JFC/Swing 1.1 and JDK 1.2, we need to create
//an Integer from the value; otherwise, the column
//switches to contain Strings. Starting with v 1.3,
//the table automatically converts value to an Integer,
//so you only need the code in the 'else' part of this
//'if' block.
try {
data[row][col] = new Integer(value.toString());
fireTableCellUpdated(row, col);
} catch (NumberFormatException e) {
JOptionPane.showMessageDialog(TableRenderDemo.this,
"The \"" + getColumnName(col)
+ "\" column accepts only integer values.");
} else {
data[row][col] = value;
fireTableCellUpdated(row, col);
if (DEBUG) {
System.out.println("New value of data:");
printDebugData();
private void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount();
for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + data[i][j]);
System.out.println();
System.out.println("--------------------------");
*This program for add some buttons and a table on JFrame
import java.awt.*;
import javax.swing.*;
public class TestMain extends JFrame{
private static TableRenderDemo tRD;
 private static TestMain tM;
protected static Container c;
private static DrawCalendar dC;
 public static void main(String[] args){
 tM = new TestMain();
 tM.setVisible(true);
 public TestMain(){
 super(" Test");
 setSize(800,600);
//set up layoutManager
c=getContentPane();
c.setLayout ( new GridLayout(3,1));
tRD=new TableRenderDemo();
dC=new DrawCalendar();
addItems();//add Buttons to JFrame
private void addItems(){
 c.add(dC); //add Buttons to JFrame
 //c.add(tRD); //add Table to JFrame

Click Here and follow the steps to configure your Linksys Router with Version FIOS.

JTable displays string in wrong order : my code problem or Java problem ?

I have the following code that displays data in a JTable, most of the time it works fine, but I've realized when I have a cell with values like : "Snowboarding"+"[123456789]"
It would display it as : [Snowboarding[123456789
For a string like : "Chasing toddlers"+"<123456789>"
It would display it as : <Chasing toddlers<123456789
It not only moved the last bracket to the front, but also changed its direction from "]" to "[" and from ">" to "<"
Is there anything wrong with my code ? Or is this a Java problem ?
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import java.io.*;
import java.sql.*;
import java.util.*;
import java.util.List;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
public class Table_Panel extends JPanel implements ItemListener
public static final long serialVersionUID=26362862L;
static final int Row_Color_Style_Default=-1,Row_Color_Style_None=0,Row_Color_Style_Blue_Gray=1,Row_Color_Style_Cyan_Gray=2,Row_Color_Style_Blue=3,
 Row_Color_Style_Gray=4,Row_Color_Style_Red_Green=5,Row_Color_Style_Green_Yellow=6,Row_Color_Style_Red_Yellow=7,
 Max_Header_Cell_Width=0,Header_Width=1,Cell_Width=2;
static int Row_Color_Style=Row_Color_Style_Cyan_Gray,Preffered_Width=Header_Width;
// static int Row_Color_Style=Row_Color_Style_None,Preffered_Width=Header_Width;
//boolean Debug=true,
boolean Debug=false,
// Use_Row_Colors=true,
 Use_Row_Colors=false;
JFrame Table_Frame;
TableModel My_Model;
JScrollPane scrollPane=new JScrollPane();
public JTable Table;
static String columnNames[],Default_Delimiter=\",\";
Object[][] data;
static Dimension Screen_Size=Toolkit.getDefaultToolkit().getScreenSize();
int Column_Width[];
static Color Default_Selection_Color=new Color(250,135,200);
Color Selection_Color=Default_Selection_Color;
public Table_Panel(ResultSet RS,String Table_Name,boolean Show_External_Table,int Row_Color_Style,int Preffered_Width,boolean In_Original_Order)
 String Value,Table_Column_Names[]=null;
 Object[][] Table_Data=null;
 int Row_Count,Index=0;
 try
 if (RS==null) return;
 else
 RS.last();
 Row_Count=RS.getRow();
 RS.beforeFirst();
 ResultSetMetaData rsmd=RS.getMetaData();
 int Column_Count=rsmd.getColumnCount();
 Table_Column_Names=new String[Column_Count];
 Table_Data=new Object[Row_Count][Column_Count];
 for (int i=1;i<=Column_Count;i++) Table_Column_Names[i-1]=rsmd.getColumnLabel(i); // Get column names
//Out("Row_Count="+Row_Count+" Column_Count="+Column_Count);
 while (RS.next()) // Get all rows
 for (int i=1;i<=Column_Count;i++)
 Value=RS.getString(i);
 Table_Data[Index][i-1]=(Value==null)?"null":Value;
 Index++;
// if (Test_Ct++>300) break;
 catch (Exception e) { e.printStackTrace(); }
 scrollPane=new Table_Panel(Table_Name,Table_Column_Names,Table_Data,Table_Data.length,false,Show_External_Table,false,Row_Color_Style,Preffered_Width,Selection_Color,In_Original_Order).scrollPane;
public Table_Panel(String[] Table_Column_Names,Object[][] Table_Data,Color Selection_Color,boolean In_Original_Order)
 this("",Table_Column_Names,Table_Data,Table_Data.length,false,false,false,Row_Color_Style,Preffered_Width,Selection_Color,In_Original_Order);
public Table_Panel(String Table_Name,String[] Table_Column_Names,Object[][] Table_Data,boolean Show_External_Table,Color Selection_Color,boolean In_Original_Order)
 this(Table_Name,Table_Column_Names,Table_Data,Table_Data.length,false,Show_External_Table,false,Row_Color_Style,Preffered_Width,Selection_Color,In_Original_Order);
public Table_Panel(String Table_Name,String[] Table_Column_Names,Object[][] Table_Data,int Row_Count,boolean Is_Child,boolean Show_External_Table,boolean Manage_Attachment,int Row_Color_Style,int Preffered_Width,Color Selection_Color,boolean In_Original_Order)
 columnNames=Table_Column_Names;
 if (In_Original_Order) data=Table_Data;
 else
 data=new Object[Table_Data.length][columnNames.length];
 for (int row=0;row<Table_Data.length;row++)
 data[row]=new Object[columnNames.length];
 for (int Column=0;Column<Table_Data[row].length;Column++) data[row][Column]=Table_Data[Table_Data.length-1-row][Column];
 Column_Width=new int[columnNames.length];
 this.Row_Color_Style=Row_Color_Style;
 Use_Row_Colors=(Row_Color_Style!=Row_Color_Style_None);
 this.Preffered_Width=Preffered_Width;
 if (Selection_Color!=null) this.Selection_Color=Selection_Color;
// Out("this.Selection_Color="+this.Selection_Color);
// TableModel My_Model=new DefaultTableModel(Table_Data,columnNames)
 TableModel My_Model=new DefaultTableModel(data,columnNames)
 public int getColumnCount() { return columnNames.length; }
 public int getRowCount() { return data.length; }
 public String getColumnName(int col) { return columnNames[col]; }
 public Object getValueAt(int row,int col)
// Out(row+","+col+"["+data[row][col]+"] data.length="+data.length+" data[0].length="+data[0].length);
 return (data[row][col]==null)?"":((data[row][col] instanceof Boolean)?data[row][col]:data[row][col].toString()); // Non-boolean values will have bgcolor
 public Class getColumnClass(int column)
 Class returnValue;
 if ((column>=0) && (column<getColumnCount())) returnValue=getValueAt(0,column).getClass();
 else returnValue=Object.class;
 return returnValue;
 // JTable uses this method to determine the default renderer/editor for each cell. If we didn't implement this method, then the last column would contain text ("true"/"false"), rather than a check box.
// public Class getColumnClass(int c) { return getValueAt(0,c).getClass(); }
 // Don't need to implement this method unless your table's editable.
 public boolean isCellEditable(int row,int col)
 //Note that the data/cell address is constant, no matter where the cell appears onscreen.
 if (col<0) return false;
 else return true;
 // Don't need to implement this method unless your table's data can change.
 public void setValueAt(Object value,int row,int col)
 String Execution_Dir=getClass().getProtectionDomain().getCodeSource().getLocation().toString();
 if (Debug) System.out.println("Execution_Dir="+Execution_Dir+"\nLast_Value="+Table_Grid_Cell_Renderer.Last_Value+" Setting value at [ "+row+","+col+" ] to "+value+" (an instance of "+value.getClass()+")");
 if (Execution_Dir.toLowerCase().indexOf("c:/")!=-1 || value.getClass()==Boolean.class || !Use_Row_Colors) data[row][col]=value;
// else data[row][col]=(Table_Grid_CellRenderer.Last_Value==null)?value:value.toString().substring(Table_Grid_CellRenderer.Last_Value.toString().length());
 fireTableCellUpdated(row,col);
 if (Debug)
 System.out.println("New value of data :");
 printDebugData();
 private void printDebugData()
 int numRows=getRowCount();
 int numCols=getColumnCount();
 for (int i=0;i<numRows;i++)
 System.out.print(" row "+i+":");
 for (int j=0;j<numCols;j++) System.out.print(" "+data[i][j]);
 System.out.println();
 System.out.println("--------------------------------------------------------------------------");
 TableSorter sorter=new TableSorter(My_Model);
 Table=new JTable(sorter)
// Table=new JTable(My_Model)
 public static final long serialVersionUID=26362862L;
 public String getToolTipText(MouseEvent e) // Implement table cell tool tips.
 Object Cell_Tip;
 String tip=null;
 java.awt.Point p=e.getPoint();
 int rowIndex=rowAtPoint(p);
 int colIndex=columnAtPoint(p);
 int realColumnIndex=convertColumnIndexToModel(colIndex);
 Cell_Tip=getValueAt(rowIndex,colIndex);
// if (realColumnIndex == 2) //Sport column
 tip=Cell_Tip.toString();
 else if (realColumnIndex == 4) //Veggie column
 TableModel model=getModel();
 String firstName=(String)model.getValueAt(rowIndex,0);
 String lastName=(String)model.getValueAt(rowIndex,1);
 Boolean veggie=(Boolean)model.getValueAt(rowIndex,4);
 if (Boolean.TRUE.equals(veggie)) tip=firstName+" "+lastName+" is a vegetarian";
 else tip=firstName+" "+lastName+" is not a vegetarian";
 else
 // You can omit this part if you know you don't have any renderers that supply their own tool tips.
 tip=super.getToolTipText(e);
 return tip;
// RowSorter<TableModel> sorter=new TableRowSorter<TableModel>(My_Model);
// Table.setRowSorter(sorter);
 Table.setSelectionBackground(this.Selection_Color);
 int Table_Height=Table.getRowHeight()*Row_Count;
 // sorter.addMouseListenerToHeaderInTable(Table); // ADDED THIS
 sorter.setTableHeader(Table.getTableHeader());
 if (Table_Column_Names.length>20) Table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
 if (Manage_Attachment) Table.setPreferredScrollableViewportSize(new Dimension(500,(Table_Height>850)?850:Table_Height));
 else Table.setPreferredScrollableViewportSize(new Dimension(1000,(Table_Height>850)?850:Table_Height));
 if (Use_Row_Colors) Table.setDefaultRenderer(Object.class,new Table_Grid_Cell_Renderer());
 //Create the scroll pane and add the table to it.
 scrollPane=new JScrollPane(Table);
 //Set up column sizes.
 initColumnSizes(Table,My_Model);
 //Add the scroll pane to this window.
 if (Show_External_Table)
 Table_Frame=new JFrame(Table_Name);
 Table_Frame.getContentPane().add(scrollPane);
 Table_Frame.addWindowListener(new WindowAdapter()
 public void windowActivated(WindowEvent e) { }
 public void windowClosed(WindowEvent e) { }
 public void windowClosing(WindowEvent e) { System.exit(0); }
 public void windowDeactivated(WindowEvent e) { }
 public void windowDeiconified(WindowEvent e) { scrollPane.repaint(); }
 public void windowGainedFocus(WindowEvent e) { scrollPane.repaint(); }
 public void windowIconified(WindowEvent e) { }
 public void windowLostFocus(WindowEvent e) { }
 public void windowOpening(WindowEvent e) { scrollPane.repaint(); }
 public void windowOpened(WindowEvent e) { }
 public void windowResized(WindowEvent e) { scrollPane.repaint(); }
 public void windowStateChanged(WindowEvent e) { scrollPane.repaint(); }
 Table_Frame.pack();
 Table_Frame.setBounds((Screen_Size.width-Table_Frame.getWidth())/2,(Screen_Size.height-Table_Frame.getHeight())/2,Table_Frame.getWidth(),Table_Frame.getHeight());
 Table_Frame.setVisible(true);
 if (Is_Child) Table_Frame.addComponentListener(new ComponentAdapter() { public void componentClosing(ComponentEvent e) { System.exit(0); } });
 else add(scrollPane);
public Table_Panel(String File_Name) { this(File_Name,false,Row_Color_Style_Cyan_Gray,Preffered_Width,null,Default_Selection_Color,true); }
public Table_Panel(String File_Name,int Row_Color_Style,boolean In_Original_Order) { this(File_Name,false,Row_Color_Style,Preffered_Width,null,Default_Selection_Color,In_Original_Order); }
public Table_Panel(String File_Name,String Delimiter,boolean In_Original_Order) { this(File_Name,false,Row_Color_Style_Cyan_Gray,Preffered_Width,Delimiter,Default_Selection_Color,In_Original_Order); }
public Table_Panel(String File_Name,int Preffered_Width,String Delimiter,boolean In_Original_Order) { this(File_Name,false,Row_Color_Style,Preffered_Width,Delimiter,Default_Selection_Color,In_Original_Order); }
public Table_Panel(String File_Name,int Row_Color_Style,int Preffered_Width,String Delimiter,boolean In_Original_Order) { this(File_Name,false,Row_Color_Style,Preffered_Width,Delimiter,Default_Selection_Color,In_Original_Order); }
public Table_Panel(String File_Name,boolean Show_External_Table,boolean In_Original_Order) { this(File_Name,Show_External_Table,Row_Color_Style,Preffered_Width,null,Default_Selection_Color,In_Original_Order); }
public Table_Panel(String File_Name,boolean Show_External_Table,String Delimiter,boolean In_Original_Order) { this(File_Name,Show_External_Table,Row_Color_Style,Preffered_Width,Delimiter,Default_Selection_Color,In_Original_Order); }
public Table_Panel(String File_Name,boolean Show_External_Table,int Row_Color_Style,int Preffered_Width,String Delimiter,Color Selection_Color,boolean In_Original_Order)
 String Table_Column_Names[],Column_Name_Line="";
 int Row_Count=0,Index=0;
 boolean Is_Child=false,Manage_Attachment=false;
 StringTokenizer ST;
 if (Delimiter==null) Delimiter=Default_Delimiter;
 if (new File(File_Name).exists())
 try
 String Line,Str=Tool_Lib.Read_File(File_Name).toString();
 ST=new StringTokenizer(Str,"\n");
 Line=ST.nextToken();
 Row_Count=ST.countTokens();
 Object[][] Table_Data=new Object[Row_Count][];
 if (Delimiter.equals(" ")) Line=Line.replaceAll(" {2,}"," ").trim(); // Replace multiple spaces with the delimiter space
 Table_Column_Names=Line.split(Delimiter);
 columnNames=Table_Column_Names;
 for (int i=0;i<Table_Column_Names.length;i++) Column_Name_Line+=Table_Column_Names[i]+" ";
//Out("Column_Name_Line [ "+Table_Column_Names.length+" ]="+Column_Name_Line);
 while (ST.hasMoreTokens())
 Line=ST.nextToken();
//Out(Line);
 if (Delimiter.equals(" ")) Line=Line.replaceAll(" {2,}"," ").trim(); // Replace multiple spaces with the delimiter space
 if (Line.indexOf(Delimiter)!=-1) Table_Data[Index]=Line.split(Delimiter);
 else
 Table_Data[Index]=new Object[Table_Column_Names.length];
 Table_Data[Index][0]=Line;
 for (int i=1;i<Table_Column_Names.length;i++) Table_Data[Index]="";
Index++;
Line="";
for (int i=0;i<Table_Data.length;i++)
Line+="[ "+Table_Data[i].length+" ] ";
for (int j=0;j<Table_Data[i].length;j++) Line+=Table_Data[i][j]+" ";
Line+="\n";
Out(Line);
Table_Panel A_Table_Panel=new Table_Panel(File_Name,Table_Column_Names,Table_Data,Row_Count,Is_Child,Show_External_Table,Manage_Attachment,Row_Color_Style,Preffered_Width,Selection_Color,In_Original_Order);
Table=A_Table_Panel.Table;
scrollPane=A_Table_Panel.scrollPane;
Column_Width=A_Table_Panel.Column_Width;
data=A_Table_Panel.data;
catch (Exception e) { e.printStackTrace(); }
public void setPreferredSize(Dimension A_Dimension) { scrollPane.setPreferredSize(A_Dimension); }
// This method picks good column sizes. If all column heads are wider than the column's cells' contents, then you can just use column.sizeWidthToFit().
void initColumnSizes(JTable table,TableModel model)
TableColumn column=null;
Component comp=null;
int headerWidth=0,cellWidth=0;
Object[] longValues=(data.length>0)?data[0]:null;
TableCellRenderer headerRenderer=table.getTableHeader().getDefaultRenderer();
if (data.length<1) return;
for (int i=0;i<model.getColumnCount();i++)
column=table.getColumnModel().getColumn(i);
comp=headerRenderer.getTableCellRendererComponent(null,column.getHeaderValue(),false,false,0,0);
headerWidth=comp.getPreferredSize().width;
comp=table.getDefaultRenderer(model.getColumnClass(i)).
getTableCellRendererComponent(table,longValues[i],false,false,0,i);
cellWidth=comp.getPreferredSize().width;
switch (Preffered_Width)
case Max_Header_Cell_Width : column.setPreferredWidth(Math.max(headerWidth,cellWidth));break;
case Header_Width : column.setPreferredWidth(headerWidth);break;
case Cell_Width : column.setPreferredWidth(cellWidth);break;
Column_Width[i]=column.getPreferredWidth();
if (Debug) Out("Initializing width of column "+i+". "+"headerWidth="+headerWidth+"; cellWidth="+cellWidth+" Column_Width["+i+"]="+Column_Width[i]);
// Detects a state change in any of the Lists. Resets the variable corresponding to the selected item in a particular List. Invokes changeFont with the currently selected fontname, style and size attributes.
public void itemStateChanged(ItemEvent e)
Out(e.toString());
if (e.getStateChange() != ItemEvent.SELECTED) return;
Object list=e.getSource();
public static void Out(String message) { System.out.println(message); }
// Create the GUI and show it. For thread safety, this method should be invoked from the event-dispatching thread.
static void Create_And_Show_GUI()
boolean Demo_External_Table=true;
// boolean Demo_External_Table=false;
final Table_Panel demo;
String[] columnNames={"First Names","Last Names","Sport","Num of Years","Vegetarian"};
Object[][] data={{"Mary","Campione","Snowboarding"+"[123456789]",new Integer(5),new Boolean(false)},
{"Alison","Huml","Rowing"+":123456789]",new Integer(3),new Boolean(true)},
{"Frank","Ni","Running"+":123456789", new Integer(12), new Boolean(false)},
{"Kathy","Walrath","Chasing toddlers"+"<123456789>", new Integer(2), new Boolean(false)},
{"Mark", "Andrews","Speed reading",new Integer(20),new Boolean(true)},
{"Angela","Lih","Teaching high school",new Integer(36),new Boolean(false)} };
// Row_Color_Style=Row_Color_Style_Default;
// Row_Color_Style=Row_Color_Style_None;
// Row_Color_Style=Row_Color_Style_Blue_Gray;
Row_Color_Style=Row_Color_Style_Cyan_Gray;
// Row_Color_Style=Row_Color_Style_Blue;
// Row_Color_Style=Row_Color_Style_Gray;
// Row_Color_Style=Row_Color_Style_Red_Green;
// Row_Color_Style=Row_Color_Style_Green_Yellow;
// Row_Color_Style=Row_Color_Style_Red_Yellow;
Preffered_Width=Max_Header_Cell_Width;
if (Demo_External_Table) demo=new Table_Panel("External Table Demo",columnNames,data,data.length,false,Demo_External_Table,false,Row_Color_Style,Max_Header_Cell_Width,Default_Selection_Color,true);
else
JFrame Table_Frame=new JFrame("Internal Table Demo");
// demo=new Table_Panel(Nm_Lib.Dir_A_Test+"ELX.csv",false,Row_Color_Style,Preffered_Width,null);
// demo=new Table_Panel(Nm_Lib.Dir_Stock_Data+"ABV_Data.txt",false,Row_Color_Style,Preffered_Width," ");
demo=new Table_Panel("C:/Dir_Stock_Data/EOP.txt",",",false);
// demo=new Table_Panel(Nm_Lib.Dir_Stock_Data+"ABV_Data.txt"," ",false);
Table_Frame.getContentPane().add(demo.scrollPane);
Table_Frame.addWindowListener(new WindowAdapter()
public void windowActivated(WindowEvent e) { }
public void windowClosed(WindowEvent e) { }
public void windowClosing(WindowEvent e) { System.exit(0); }
public void windowDeactivated(WindowEvent e) { }
public void windowDeiconified(WindowEvent e) { demo.repaint(); }
public void windowGainedFocus(WindowEvent e) { demo.repaint(); }
public void windowIconified(WindowEvent e) { }
public void windowLostFocus(WindowEvent e) { }
public void windowOpening(WindowEvent e) { demo.repaint(); }
public void windowOpened(WindowEvent e) { }
public void windowResized(WindowEvent e) { demo.repaint(); }
public void windowStateChanged(WindowEvent e) { demo.repaint(); }
Table_Frame.pack();
Table_Frame.setBounds((Screen_Size.width-Table_Frame.getWidth())/2,(Screen_Size.height-Table_Frame.getHeight())/2,Table_Frame.getWidth(),Table_Frame.getHeight());
Table_Frame.setVisible(true);
public static void main(String[] args)
// Schedule a job for the event-dispatching thread : creating and showing this application's GUI.
SwingUtilities.invokeLater(new Runnable() { public void run() { Create_And_Show_GUI(); } });
* TableSorter is a decorator for TableModels; adding sorting functionality to a supplied TableModel. TableSorter does not store
* or copy the data in its TableModel; instead it maintains a map from the row indexes of the view to the row indexes of the
* model. As requests are made of the sorter (like getValueAt(row, col)) they are passed to the underlying model after the row numbers
* have been translated via the internal mapping array. This way, the TableSorter appears to hold another copy of the table
* with the rows in a different order.
* 
* TableSorter registers itself as a listener to the underlying model, just as the JTable itself would. Events recieved from the model
* are examined, sometimes manipulated (typically widened), and then passed on to the TableSorter's listeners (typically the JTable).
* If a change to the model has invalidated the order of TableSorter's rows, a note of this is made and the sorter will resort the
* rows the next time a value is requested.
* 
* When the tableHeader property is set, either by using the setTableHeader() method or the two argument constructor, the table
* header may be used as a complete UI for TableSorter. The default renderer of the tableHeader is decorated with a renderer
* that indicates the sorting status of each column. In addition, a mouse listener is installed with the following behavior:
* <ul>
* <li>
* Mouse-click: Clears the sorting status of all other columns and advances the sorting status of that column through three
* values: {NOT_SORTED, ASCENDING, DESCENDING} (then back to NOT_SORTED again).
* <li>
* SHIFT-mouse-click: Clears the sorting status of all other columns and cycles the sorting status of the column through the same
* three values, in the opposite order: {NOT_SORTED, DESCENDING, ASCENDING}.
* <li>
* CONTROL-mouse-click and CONTROL-SHIFT-mouse-click: as above except that the changes to the column do not cancel the statuses of columns
* that are already sorting - giving a way to initiate a compound sort.
* </ul>
* 
* This is a long overdue rewrite of a class of the same name that first appeared in the swing table demos in 1997.
* @author Philip Milne
* @author Brendon McLean
* @author Dan van Enckevort
* @author Parwinder Sekhon
* @version 2.0 02/27/04
class TableSorter extends AbstractTableModel
public static final long serialVersionUID=26362862L;
protected TableModel tableModel;
public static final int DESCENDING = -1;
public static final int NOT_SORTED = 0;
public static final int ASCENDING = 1;
private static Directive EMPTY_DIRECTIVE = new Directive(-1, NOT_SORTED);
public static final Comparator COMPARABLE_COMAPRATOR = new Comparator() { public int compare(Object o1, Object o2) { return ((Comparable) o1).compareTo(o2); } };
public static final Comparator LEXICAL_COMPARATOR = new Comparator() { public int compare(Object o1, Object o2) { return o1.toString().compareTo(o2.toString()); } };
private Row[] viewToModel;
private int[] modelToView;
private JTableHeader tableHeader;
private MouseListener mouseListener;
private TableModelListener tableModelListener;
private Map<Class,Comparator> columnComparators = new HashMap<Class,Comparator>();
private List<Directive> sortingColumns = new ArrayList<Directive>();
public TableSorter()
this.mouseListener = new MouseHandler();
this.tableModelListener = new TableModelHandler();
public TableSorter(TableModel tableModel)
this();
setTableModel(tableModel);
public TableSorter(TableModel tableModel, JTableHeader tableHeader)
this();
setTableHeader(tableHeader);
setTableModel(tableModel);
private void clearSortingState()
viewToModel = null;
modelToView = null;
public TableModel getTableModel() { return tableModel; }
public void setTableModel(TableModel tableModel)
if (this.tableModel != null) { this.tableModel.removeTableModelListener(tableModelListener); }
this.tableModel = tableModel;
if (this.tableModel != null) { this.tableModel.addTableModelListener(tableModelListener); }
clearSortingState();
fireTableStructureChanged();
public JTableHeader getTableHeader() { return tableHeader; }
public void setTableHeader(JTableHeader tableHeader)
if (this.tableHeader != null)
this.tableHeader.removeMouseListener(mouseListener);
TableCellRenderer defaultRenderer = this.tableHeader.getDefaultRenderer();
if (defaultRenderer instanceof SortableHeaderRenderer) this.tableHeader.setDefaultRenderer(((SortableHeaderRenderer) defaultRenderer).tableCellRenderer);
this.tableHeader = tableHeader;
if (this.tableHeader != null)
this.tableHeader.addMouseListener(mouseListener);
this.tableHeader.setDefaultRenderer(
new SortableHeaderRenderer(this.tableHeader.getDefaultRenderer()));
public boolean isSorting() { return sortingColumns.size() != 0; }
private Directive getDirective(int column)
for (int i = 0; i < sortingColumns.size(); i++)
Directive directive = (Directive)sortingColumns.get(i);
if (directive.column == column) { return directive; }
return EMPTY_DIRECTIVE;
public int getSortingStatus(int column) { return getDirective(column).direction; }
private void sortingStatusChanged()
clearSortingState();
fireTableDataChanged();
if (tableHeader != null) { tableHeader.repaint(); }
public void setSortingStatus(int column, int status)
Directive directive = getDirective(column);
if (directive != EMPTY_DIRECTIVE) { sortingColumns.remove(directive); }
if (status != NOT_SORTED) { sortingColumns.add(new Directive(column, status)); }
sortingStatusChanged();
protected Icon getHeaderRendererIcon(int column, int size)
Directive directive = getDirective(column);
if (directive == EMPTY_DIRECTIVE) { return null; }
return new Arrow(directive.direction == DESCENDING, size, sortingColumns.indexOf(directive));
private void cancelSorting()
sortingColumns.clear();
sortingStatusChanged();
public void setColumnComparator(Class type, Comparator comparator)
if (comparator == null) { columnComparators.remove(type); }
else { columnComparators.put(type, comparator); }
protected Comparator getComparator(int column)
Class columnType = tableModel.getColumnClass(column);
Comparator comparator = (Comparator) columnComparators.get(columnType);
if (comparator != null) { return comparator; }
if (Comparable.class.isAssignableFrom(columnType)) { return COMPARABLE_COMAPRATOR; }
return LEXICAL_COMPARATOR;
private Row[] getViewToModel()
if (viewToModel == null)
int tableModelRowCount = tableModel.getRowCount();
viewToModel = new Row[tableModelRowCount];
for (int row = 0; row < tableModelRowCount; row++) { viewToModel[row] = new Row(row); }
if (isSorting()) { Arrays.sort(viewToModel); }
return viewToModel;
public int modelIndex(int viewIndex) { return getViewToModel()[viewIndex].modelIndex; }
private int[] getModelToView()
if (modelToView == null)
int n = getViewToModel().length;
modelToView = new int[n];
for (int i = 0; i < n; i++) { modelToView[modelIndex(i)] = i; }
return modelToView;
// TableModel interface methods
public int getRowCount() { return (tableModel == null) ? 0 : tableModel.getRowCount(); }
public int getColumnCount() { return (tableModel == null) ? 0 : tableModel.getColumnCount(); }
public String getColumnName(int column) { return tableModel.getColumnName(column); }
public Class getColumnClass(int column) { return tableModel.getColumnClass(column); }
public boolean isCellEditable(int row, int column) { return tableModel.isCellEditable(modelIndex(row), column); }
public Object getValueAt(int row, int column) { return tableModel.getValueAt(modelIndex(row), column); }
public void setValueAt(Object aValue, int row, int column) { tableModel.setValueAt(aValue, modelIndex(row), column); }
// Helper classes
private class Row implements Comparable
private int modelIndex;
public Row(int index) { this.modelIndex = index; }
public int compareTo(Object o)
int row1 = modelIndex;
int row2 = ((Row) o).modelIndex;
for (Iterator it = sortingColumns.iterator(); it.hasNext();)
Directive directive = (Directive) it.next();
int column = directive.column;
Object o1 = tableModel.getValueAt(row1, column);
Object o2 = tableModel.getValueAt(row2, column);
int comparison = 0;
// Define null less than everything, except null.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import java.io.*;
import java.sql.*;
import java.util.*;
import java.util.List;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
public class Table_Panel extends JPanel implements ItemListener
public static final long serialVersionUID=26362862L;
static final int Row_Color_Style_Default=-1,Row_Color_Style_None=0,Row_Color_Style_Blue_Gray=1,Row_Color_Style_Cyan_Gray=2,Row_Color_Style_Blue=3,
 Row_Color_Style_Gray=4,Row_Color_Style_Red_Green=5,Row_Color_Style_Green_Yellow=6,Row_Color_Style_Red_Yellow=7,
 Max_Header_Cell_Width=0,Header_Width=1,Cell_Width=2;
static int Row_Color_Style=Row_Color_Style_Cyan_Gray,Preffered_Width=Header_Width;
// static int Row_Color_Style=Row_Color_Style_None,Preffered_Width=Header_Width;
//boolean Debug=true,
boolean Debug=false,
// Use_Row_Colors=true,
 Use_Row_Colors=false;
JFrame Table_Frame;
TableModel My_Model;
JScrollPane scrollPane=new JScrollPane();
public JTable Table;
static String columnNames[],Default_Delimiter=",";
Object[][] data;
static Dimension Screen_Size=Toolkit.getDefaultToolkit().getScreenSize();
int Column_Width[];
static Color Default_Selection_Color=new Color(250,135,200);
Color Selection_Color=Default_Selection_Color;
public Table_Panel(ResultSet RS,String Table_Name,boolean Show_External_Table,int Row_Color_Style,int Preffered_Width,boolean In_Original_Order)
 String Value,Table_Column_Names[]=null;
 Object[][] Table_Data=null;
 int Row_Count,Index=0;
 try
 if (RS==null) return;
 else
 RS.last();
 Row_Count=RS.getRow();
 RS.beforeFirst();
 ResultSetMetaData rsmd=RS.getMetaData();
 int Column_Count=rsmd.getColumnCount();
 Table_Column_Names=new String[Column_Count];
 Table_Data=new Object[Row_Count][Column_Count];
 for (int i=1;i<=Column_Count;i++) Table_Column_Names[i-1]=rsmd.getColumnLabel(i); // Get column names
//Out("Row_Count="+Row_Count+" Column_Count="+Column_Count);
 while (RS.next()) // Get all rows
 for (int i=1;i<=Column_Count;i++)
 Value=RS.getString(i);
 Table_Data[Index][i-1]=(Value==null)?"null":Value;
 Index++;
// if (Test_Ct++>300) break;
 catch (Exception e) { e.printStackTrace(); }
 scrollPane=new Table_Panel(Table_Name,Table_Column_Names,Table_Data,Table_Data.length,false,Show_External_Table,false,Row_Color_Style,Preffered_Width,Selection_Color,In_Original_Order).scrollPane;
public Table_Panel(String[] Table_Column_Names,Object[][] Table_Data,Color Selection_Color,boolean In_Original_Order)
 this("",Table_Column_Names,Table_Data,Table_Data.length,false,false,false,Row_Color_Style,Preffered_Width,Selection_Color,In_Original_Order);
public Table_Panel(String Table_Name,String[] Table_Column_Names,Object[][] Table_Data,boolean Show_External_Table,Color Selection_Color,boolean In_Original_Order)
 this(Table_Name,Table_Column_Names,Table_Data,Table_Data.length,false,Show_External_Table,false,Row_Color_Style,Preffered_Width,Selection_Color,In_Original_Order);
public Table_Panel(String Table_Name,String[] Table_Column_Names,Object[][] Table_Data,int Row_Count,boolean Is_Child,boolean Show_External_Table,boolean Manage_Attachment,int Row_Color_Style,int Preffered_Width,Color Selection_Color,boolean In_Original_Order)
 columnNames=Table_Column_Names;
 if (In_Original_Order) data=Table_Data;
 else
 data=new Object[Table_Data.length][columnNames.length];
 for (int row=0;row<Table_Data.length;row++)
 data[row]=new Object[columnNames.length];
 for (int Column=0;Column<Table_Data[row].length;Column++) data[row][Column]=Table_Data[Table_Data.length-1-row][Column];
 Column_Width=new int[columnNames.length];
 this.Row_Color_Style=Row_Color_Style;
 Use_Row_Colors=(Row_Color_Style!=Row_Color_Style_None);
 this.Preffered_Width=Preffered_Width;
 if (Selection_Color!=null) this.Selection_Color=Selection_Color;
// Out("this.Selection_Color="+this.Selection_Color);
// TableModel My_Model=new DefaultTableModel(Table_Data,columnNames)
 TableModel My_Model=new DefaultTableModel(data,columnNames)
 public int getColumnCount() { return columnNames.length; }
 public int getRowCount() { return data.length; }
 public String getColumnName(int col) { return columnNames[col]; }
 public Object getValueAt(int row,int col)
// Out(row+","+col+"["+data[row][col]+"] data.length="+data.length+" data[0].length="+data[0].length);
 return (data[row][col]==null)?"":((data[row][col] instanceof Boolean)?data[row][col]:data[row][col].toString()); // Non-boolean values will have bgcolor
 public Class getColumnClass(int column)
 Class returnValue;
 if ((column>=0) && (column<getColumnCount())) returnValue=getValueAt(0,column).getClass();
 else returnValue=Object.class;
 return returnValue;
 // JTable uses this method to determine the default renderer/editor for each cell. If we didn't implement this method, then the last column would contain text ("true"/"false"), rather than a check box.
// public Class getColumnClass(int c) { return getValueAt(0,c).getClass(); }
 // Don't need to implement this method unless your table's editable.
 public boolean isCellEditable(int row,int col)
 //Note that the data/cell address is constant, no matter where the cell appears onscreen.
 if (col<0) return false;
 else return true;
 // Don't need to implement this method unless your table's data can change.
 public void setValueAt(Object value,int row,int col)
 String Execution_Dir=getClass().getProtectionDomain().getCodeSource().getLocation().toString();
 if (Debug) System.out.println("Execution_Dir="+Execution_Dir+"\nLast_Value="+Table_Grid_Cell_Renderer.Last_Value+" Setting value at [ "+row+","+col+" ] to "+value+" (an instance of "+value.getClass()+")");
 if (Execution_Dir.toLowerCase().indexOf("c:/")!=-1 || value.getClass()==Boolean.class || !Use_Row_Colors) data[row][col]=value;
// else data[row][col]=(Table_Grid_CellRenderer.Last_Value==null)?value:value.toString().substring(Table_Grid_CellRenderer.Last_Value.toString().length());
 fireTableCellUpdated(row,col);
 if (Debug)
 System.out.println("New value of data :");
 printDebugData();
 private void printDebugData()
 int numRows=getRowCount();
 int numCols=getColumnCount();
 for (int i=0;i<numRows;i++)
 System.out.print(" row "+i+":");
 for (int j=0;j<numCols;j++) System.out.print(" "+data[i][j]);
 System.out.println();
 System.out.println("--------------------------------------------------------------------------");
 TableSorter sorter=new TableSorter(My_Model);
 Table=new JTable(sorter)
// Table=new JTable(My_Model)
 public static final long serialVersionUID=26362862L;
 public String getToolTipText(MouseEvent e) // Implement table cell tool tips.
 Object Cell_Tip;
 String tip=null;
 java.awt.Point p=e.getPoint();
 int rowIndex=rowAtPoint(p);
 int colIndex=columnAtPoint(p);
 int realColumnIndex=convertColumnIndexToModel(colIndex);
 Cell_Tip=getValueAt(rowIndex,colIndex);
// if (realColumnIndex == 2) //Sport column
 tip=Cell_Tip.toString();
 else if (realColumnIndex == 4) //Veggie column
 TableModel model=getModel();
 String firstName=(String)model.getValueAt(rowIndex,0);
 String lastName=(String)model.getValueAt(rowIndex,1);
 Boolean veggie=(Boolean)model.getValueAt(rowIndex,4);
 if (Boolean.TRUE.equals(veggie)) tip=firstName+" "+lastName+" is a vegetarian";
 else tip=firstName+" "+lastName+" is not a vegetarian";
 else
 // You can omit this part if you know you don't have any renderers that supply their own tool tips.
 tip=super.getToolTipText(e);
 return tip;
// RowSorter<TableModel> sorter=new TableRowSorter<TableModel>(My_Model);
// Table.setRowSorter(sorter);
 Table.setSelectionBackground(this.Selection_Color);
 int Table_Height=Table.getRowHeight()*Row_Count;
 // sorter.addMouseListenerToHeaderInTable(Table); // ADDED THIS
 sorter.setTableHeader(Table.getTableHeader());
 if (Table_Column_Names.length>20) Table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
 if (Manage_Attachment) Table.setPreferredScrollableViewportSize(new Dimension(500,(Table_Height>850)?850:Table_Height));
 else Table.setPreferredScrollableViewportSize(new Dimension(1000,(Table_Height>850)?850:Table_Height));
 if (Use_Row_Colors) Table.setDefaultRenderer(Object.class,new Table_Grid_Cell_Renderer());
 //Create the scroll pane and add the table to it.
 scrollPane=new JScrollPane(Table);
 //Set up column sizes.
 initColumnSizes(Table,My_Model);
 //Add the scroll pane to this window.
 if (Show_External_Table)
 Table_Frame=new JFrame(Table_Name);
 Table_Frame.getContentPane().add(scrollPane);
 Table_Frame.addWindowListener(new WindowAdapter()
 public void windowActivated(WindowEvent e) { }
 public void windowClosed(WindowEvent e) { }
 public void windowClosing(WindowEvent e) { System.exit(0); }
 public void windowDeactivated(WindowEvent e) { }
 public void windowDeiconified(WindowEvent e) { scrollPane.repaint(); }
 public void windowGainedFocus(WindowEvent e) { scrollPane.repaint(); }
 public void windowIconified(WindowEvent e) { }
 public void windowLostFocus(WindowEvent e) { }
 public void windowOpening(WindowEvent e) { scrollPane.repaint(); }
 public void windowOpened(WindowEvent e) { }
 public void windowResized(WindowEvent e) { scrollPane.repaint(); }
 public void windowStateChanged(WindowEvent e) { scrollPane.repaint(); }
 Table_Frame.pack();
 Table_Frame.setBounds((Screen_Size.width-Table_Frame.getWidth())/2,(Screen_Size.height-Table_Frame.getHeight())/2,Table_Frame.getWidth(),Table_Frame.getHeight());
 Table_Frame.setVisible(true);
 if (Is_Child) Table_Frame.addComponentListener(new ComponentAdapter() { public void componentClosing(ComponentEvent e) { System.exit(0); } });
 else add(scrollPane);
public Table_Panel(String File_Name) { this(File_Name,false,Row_Color_Style_Cyan_Gray,Preffered_Width,null,Default_Selection_Color,true); }
public Table_Panel(String File_Name,int Row_Color_Style,boolean In_Original_Order) { this(File_Name,false,Row_Color_Style,Preffered_Width,null,Default_Selection_Color,In_Original_Order); }
public Table_Panel(String File_Name,String Delimiter,boolean In_Original_Order) { this(File_Name,false,Row_Color_Style_Cyan_Gray,Preffered_Width,Delimiter,Default_Selection_Color,In_Original_Order); }
public Table_Panel(String File_Name,int Preffered_Width,String Delimiter,boolean In_Original_Order) { this(File_Name,false,Row_Color_Style,Preffered_Width,Delimiter,Default_Selection_Color,In_Original_Order); }
public Table_Panel(String File_Name,int Row_Color_Style,int Preffered_Width,String Delimiter,boolean In_Original_Order) { this(File_Name,false,Row_Color_Style,Preffered_Width,Delimiter,Default_Selection_Color,In_Original_Order); }
public Table_Panel(String File_Name,boolean Show_External_Table,boolean In_Original_Order) { this(File_Name,Show_External_Table,Row_Color_Style,Preffered_Width,null,Default_Selection_Color,In_Original_Order); }
public Table_Panel(String File_Name,boolean Show_External_Table,String Delimiter,boolean In_Original_Order) { this(File_Name,Show_External_Table,Row_Color_Style,Preffered_Width,Delimiter,Default_Selection_Color,In_Original_Order); }
public Table_Panel(String File_Name,boolean Show_External_Table,int Row_Color_Style,int Preffered_Width,String Delimiter,Color Selection_Color,boolean In_Original_Order)
 String Table_Column_Names[],Column_Name_Line="";
 int Row_Count=0,Index=0;
 boolean Is_Child=false,Manage_Attachment=false;
 StringTokenizer ST;
 if (Delimiter==null) Delimiter=Default_Delimiter;
 if (new File(File_Name).exists())
 try
 String Line,Str=Tool_Lib.Read_File(File_Name).toString();
 ST=new StringTokenizer(Str,"\n");
 Line=ST.nextToken();
 Row_Count=ST.countTokens();
 Object[][] Table_Data=new Object[Row_Count][];
 if (Delimiter.equals(" ")) Line=Line.replaceAll(" {2,}"," ").trim(); // Replace multiple spaces with the delimiter space
 Table_Column_Names=Line.split(Delimiter);
 columnNames=Table_Column_Names;
 for (int i=0;i<Table_Column_Names.length;i++) Column_Name_Line+=Table_Column_Names[i]+" ";
//Out("Column_Name_Line [ "+Table_Column_Names.length+" ]="+Column_Name_Line);
 while (ST.hasMoreTokens())
 Line=ST.nextToken();
//Out(Line);
 if (Delimiter.equals(" ")) Line=Line.replaceAll(" {2,}"," ").trim(); // Replace multiple spaces with the delimiter space
 if (Line.indexOf(Delimiter)!=-1) Table_Data[Index]=Line.split(Delimiter);
 else
 Table_Data[Index]=new Object[Table_Column_Names.length];
 Table_Data[Index][0]=Line;
 for (int i=1;i<Table_Column_Names.length;i++) Table_Data[Index]="";
Index++;
Line="";
for (int i=0;i<Table_Data.length;i++)
Line+="[ "+Table_Data[i].length+" ] ";
for (int j=0;j<Table_Data[i].length;j++) Line+=Table_Data[i][j]+" ";
Line+="\n";
Out(Line);
Table_Panel A_Table_Panel=new Table_Panel(File_Name,Table_Column_Names,Table_Data,Row_Count,Is_Child,Show_External_Table,Manage_Attachment,Row_Color_Style,Preffered_Width,Selection_Color,In_Original_Order);
Table=A_Table_Panel.Table;
scrollPane=A_Table_Panel.scrollPane;
Column_Width=A_Table_Panel.Column_Width;
data=A_Table_Panel.data;
catch (Exception e) { e.printStackTrace(); }
public void setPreferredSize(Dimension A_Dimension) { scrollPane.setPreferredSize(A_Dimension); }
// This method picks good column sizes. If all column heads are wider than the column's cells' contents, then you can just use column.sizeWidthToFit().
void initColumnSizes(JTable table,TableModel model)
TableColumn column=null;
Component comp=null;
int headerWidth=0,cellWidth=0;
Object[] longValues=(data.length>0)?data[0]:null;
TableCellRenderer headerRenderer=table.getTableHeader().getDefaultRenderer();
if (data.length<1) return;
for (int i=0;i<model.getColumnCount();i++)
column=table.getColumnModel().getColumn(i);
comp=headerRenderer.getTableCellRendererComponent(null,column.getHeaderValue(),false,false,0,0);
headerWidth=comp.getPreferredSize().width;
comp=table.getDefaultRenderer(model.getColumnClass(i)).
getTableCellRendererComponent(table,longValues[i],false,false,0,i);
cellWidth=comp.getPreferredSize().width;
switch (Preffered_Width)
case Max_Header_Cell_Width : column.setPreferredWidth(Math.max(headerWidth,cellWidth));break;
case Header_Width : column.setPreferredWidth(headerWidth);break;
case Cell_Width : column.setPreferredWidth(cellWidth);break;
Column_Width[i]=column.getPreferredWidth();
if (Debug) Out("Initializing width of column "+i+". "+"headerWidth="+headerWidth+"; cellWidth="+cellWidth+" Column_Width["+i+"]="+Column_Width[i]);
// Detects a state change in any of the Lists. Resets the variable corresponding to the selected item in a particular List. Invokes changeFont with the currently selected fontname, style and size attributes.
public void itemStateChanged(ItemEvent e)
Out(e.toString());
if (e.getStateChange() != ItemEvent.SELECTED) return;
Object list=e.getSource();
public static void Out(String message) { System.out.println(message); }
// Create the GUI and show it. For thread safety, this method should be invoked from the event-dispatching thread.
static void Create_And_Show_GUI()
boolean Demo_External_Table=true;
// boolean Demo_External_Table=false;
final Table_Panel demo;
String[] columnNames={"First Names","Last Names","Sport","Num of Years","Vegetarian"};
Object[][] data={{"Mary","Campione","Snowboarding"+"[123456789]",new Integer(5),new Boolean(false)},
{"Alison","Huml","Rowing"+":123456789]",new Integer(3),new Boolean(true)},
{"Frank","Ni","Running"+":123456789", new Integer(12), new Boolean(false)},
{"Kathy","Walrath","Chasing toddlers"+"<123456789>", new Integer(2), new Boolean(false)},
{"Mark", "Andrews","Speed reading",new Integer(20),new Boolean(true)},
{"Angela","Lih","Teaching high school",new Integer(36),new Boolean(false)} };
// Row_Color_Style=Row_Color_Style_Default;
// Row_Color_Style=Row_Color_Style_None;
// Row_Color_Style=Row_Color_Style_Blue_Gray;
Row_Color_Style=Row_Color_Style_Cyan_Gray;
// Row_Color_Style=Row_Color_Style_Blue;
// Row_Color_Style=Row_Color_Style_Gray;
// Row_Color_Style=Row_Color_Style_Red_Green;
// Row_Color_Style=Row_Color_Style_Green_Yellow;
// Row_Color_Style=Row_Color_Style_Red_Yellow;
Preffered_Width=Max_Header_Cell_Width;
if (Demo_External_Table) demo=new Table_Panel("External Table Demo",columnNames,data,data.length,false,Demo_External_Table,false,Row_Color_Style,Max_Header_Cell_Width,Default_Selection_Color,true);
else
JFrame Table_Frame=new JFrame("Internal Table Demo");
// demo=new Table_Panel(Nm_Lib.Dir_A_Test+"ELX.csv",false,Row_Color_Style,Preffered_Width,null);
// demo=new Table_Panel(Nm_Lib.Dir_Stock_Data+"ABV_Data.txt",false,Row_Color_Style,Preffered_Width," ");
demo=new Table_Panel("C:/Dir_Stock_Data/EOP.txt",",",false);
// demo=new Table_Panel(Nm_Lib.Dir_Stock_Data+"ABV_Data.txt"," ",false);
Table_Frame.getContentPane().add(demo.scrollPane);
Table_Frame.addWindowListener(new WindowAdapter()
public void windowActivated(WindowEvent e) { }
public void windowClosed(WindowEvent e) { }
public void windowClosing(WindowEvent e) { System.exit(0); }
public void windowDeactivated(WindowEvent e) { }
public void windowDeiconified(WindowEvent e) { demo.repaint(); }
public void windowGainedFocus(WindowEvent e) { demo.repaint(); }
public void windowIconified(WindowEvent e) { }
public void windowLostFocus(WindowEvent e) { }
public void windowOpening(WindowEvent e) { demo.repaint(); }
public void windowOpened(WindowEvent e) { }
public void windowResized(WindowEvent e) { demo.repaint(); }
public void windowStateChanged(WindowEvent e) { demo.repaint(); }
Table_Frame.pack();
Table_Frame.setBounds((Screen_Size.width-Table_Frame.getWidth())/2,(Screen_Size.height-Table_Frame.getHeight())/2,Table_Frame.getWidth(),Table_Frame.getHeight());
Table_Frame.setVisible(true);
public static void main(String[] args)
// Schedule a job for the event-dispatching thread : creating and showing this application's GUI.
SwingUtilities.invokeLater(new Runnable() { public void run() { Create_And_Show_GUI(); } });
* TableSorter is a decorator for TableModels; adding sorting functionality to a supplied TableModel. TableSorter does not store
* or copy the data in its TableModel; instead it maintains a map from the row indexes of the view to the row indexes of the
* model. As requests are made of the sorter (like getValueAt(row, col)) they are passed to the underlying model after the row numbers
* have been translated via the internal mapping array. This way, the TableSorter appears to hold another copy of the table
* with the rows in a different order.
* 
* TableSorter registers itself as a listener to the underlying model, just as the JTable itself would. Events recieved from the model
* are examined, sometimes manipulated (typically widened), and then passed on to the TableSorter's listeners (typically the JTable).
* If a change to the model has invalidated the order of TableSorter's rows, a note of this is made and the sorter will resort the
* rows the next time a value is requested.
* 
* When the tableHeader property is set, either by using the setTableHeader() method or the two argument constructor, the table
* header may be used as a complete UI for TableSorter. The default renderer of the tableHeader is decorated with a renderer
* that indicates the sorting status of each column. In addition, a mouse listener is installed with the following behavior:
* <ul>
* <li>
* Mouse-click: Clears the sorting status of all other columns and advances the sorting status of that column through three
* values: {NOT_SORTED, ASCENDING, DESCENDING} (then back to NOT_SORTED again).
* <li>
* SHIFT-mouse-click: Clears the sorting status of all other columns and cycles the sorting status of the column through the same
* three values, in the opposite order: {NOT_SORTED, DESCENDING, ASCENDING}.
* <li>
* CONTROL-mouse-click and CONTROL-SHIFT-mouse-click: as above except that the changes to the column do not cancel the statuses of columns
* that are already sorting - giving a way to initiate a compound sort.
* </ul>
* 
* This is a long overdue rewrite of a class of the same name that first appeared in the swing table demos in 1997.
* @author Philip Milne
* @author Brendon McLean
* @author Dan van Enckevort
* @author Parwinder Sekhon
* @version 2.0 02/27/04
class TableSorter extends AbstractTableModel
public static final long serialVersionUID=26362862L;
protected TableModel tableModel;
public static final int DESCENDING = -1;
public static final int NOT_SORTED = 0;
public static final int ASCENDING = 1;
private static Directive EMPTY_DIRECTIVE = new Directive(-1, NOT_SORTED);
public static final Comparator COMPARABLE_COMAPRATOR = new Comparator() { public int compare(Object o1, Object o2) { return ((Comparable) o1).compareTo(o2); } };
public static final Comparator LEXICAL_COMPARATOR = new Comparator() { public int compare(Object o1, Object o2) { return o1.toString().compareTo(o2.toString()); } };
private Row[] viewToModel;
private int[] modelToView;
private JTableHeader tableHeader;
private MouseListener mouseListener;
private TableModelListener tableModelListener;
private Map<Class,Comparator> columnComparators = new HashMap<Class,Comparator>();
private List<Directive> sortingColumns = new ArrayList<Directive>();
public TableSorter()
this.mouseListener = new MouseHandler();
this.tableModelListener = new TableModelHandler();
public TableSorter(TableModel tableModel)
this();
setTableModel(tableModel);
public TableSorter(TableModel tableModel, JTableHeader tableHeader)
this();
setTableHeader(tableHeader);
setTableModel(tableModel);
private void clearSortingState()
viewToModel = null;
modelToView = null;
public TableModel getTableModel() { return tableModel; }
public void setTableModel(TableModel tableModel)
if (this.tableModel != null) { this.tableModel.removeTableModelListener(tableModelListener); }
this.tableModel = tableModel;
if (this.tableModel != null) { this.tableModel.addTableModelListener(tableModelListener); }
clearSortingState();
fireTableStructureChanged();
public JTableHeader getTableHeader() { return tableHeader; }
public void setTableHeader(JTableHeader tableHeader)
if (this.tableHeader != null)
this.tableHeader.removeMouseListener(mouseListener);
TableCellRenderer defaultRenderer = this.tableHeader.getDefaultRenderer();
if (defaultRenderer instanceof SortableHeaderRenderer) this.tableHeader.setDefaultRenderer(((SortableHeaderRenderer) defaultRenderer).tableCellRenderer);
this.tableHeader = tableHeader;
if (this.tableHeader != null)
this.tableHeader.addMouseListener(mouseListener);
this.tableHeader.setDefaultRenderer(
new SortableHeaderRenderer(this.tableHeader.getDefaultRenderer()));
public boolean isSorting() { return sortingColumns.size() != 0; }
private Directive getDirective(int column)
for (int i = 0; i < sortingColumns.size(); i++)
Directive directive = (Directive)sortingColumns.get(i);
if (directive.column == column) { return directive; }
return EMPTY_DIRECTIVE;
public int getSortingStatus(int column) { return getDirective(column).direction; }
private void sortingStatusChanged()
clearSortingState();
fireTableDataChanged();
if (tableHeader != null) { tableHeader.repaint(); }
public void setSortingStatus(int column, int status)
Directive directive = getDirective(column);
if (directive != EMPTY_DIRECTIVE) { sortingColumns.remove(directive); }
if (status != NOT_SORTED) { sortingColumns.add(new Directive(column, status)); }
sortingStatusChanged();
protected Icon getHeaderRendererIcon(int column, int size)
Directive directive = getDirective(column);
if (directive == EMPTY_DIRECTIVE) { return null; }
return new Arrow(directive.direction == DESCENDING, size, sortingColumns.indexOf(directive));
private void cancelSorting()
sortingColumns.clear();
sortingStatusChanged();
public void setColumnComparator(Class type, Comparator comparator)
if (comparator == null) { columnComparators.remove(type); }
else { columnComparators.put(type, comparator); }
protected Comparator getComparator(int column)
Class columnType = tableModel.getColumnClass(column);
Comparator comparator = (Comparator) columnComparators.get(columnType);
if (comparator != null) { return comparator; }
if (Comparable.class.isAssignableFrom(columnType)) { return COMPARABLE_COMAPRATOR; }
return LEXICAL_COMPARATOR;
private Row[] getViewToModel()
if (viewToModel == null)
int tableModelRowCount = tableModel.getRowCount();
viewToModel = new Row[tableModelRowCount];
for (int row = 0; row < tableModelRowCount; row++) { viewToModel[row] = new Row(row); }
if (isSorting()) { Arrays.sort(viewToModel); }
return viewToModel;
public int modelIndex(int viewIndex) { return getViewToModel()[viewIndex].modelIndex; }
private int[] getModelToView()
if (modelToView == null)
int n = getViewToModel().length;
modelToView = new int[n];
for (int i = 0; i < n; i++) { modelToView[modelIndex(i)] = i; }
return modelToView;
// TableModel interface methods
public int getRowCount() { return (tableModel == null) ? 0 : tableModel.getRowCount(); }
public int getColumnCount() { return (tableModel == null) ? 0 : tableModel.getColumnCount(); }
public String getColumnName(int column) { return tableModel.getColumnName(column); }
public Class getColumnClass(int column) { return tableModel.getColumnClass(column); }
public boolean isCellEditable(int row, int column) { return tableModel.isCellEditable(modelIndex(row), column); }
public Object getValueAt(int row, int column) { return tableModel.getValueAt(modelIndex(row), column); }
public void setValueAt(Object aValue, int row, int column) { tableModel.setValueAt(aValue, modelIndex(row), column); }
// Helper classes
private class Row implements Comparable
private int modelIndex;
public Row(int index) { this.modelIndex = index; }
public int compareTo(Object o)
int row1 = modelIndex;
int row2 = ((Row) o).modelIndex;
for (Iterator it = sortingColumns.iterator(); it.hasNext();)
Directive directive = (Directive) it.next();
int column = directive.column;
Object o1 = tableModel.getValueAt(row1, column);
Object o2 = tableModel.getValueAt(row2, column);
int comparison = 0;
// Define null less than everything, except null.
if (o1 == null && o2 == null) { comparison = 0; }
else if (o1 == null) { comparison = -1; }
else if (o2 == null) { comparison = 1; }
else { comparison = getComparator(column).compare(o1, o2); }
if (comparison != 0) { return directive.direction == DESCENDING ? -comparison : comparison; }
return 0;
private class TableModelHandler implements TableModelListener
public void tableChanged(TableModelEvent e)
// If we're not sorting by anything

How to add a table(from TableRenderDemo) to a JFrame again

Hello again:
Thanks for stephen andrews's adivice, I follow your adivice to add code (it is in
EventHandeler of DrawCalendar class, and they indicated by ???????????), but it still not work, please check for me why, Thanks.
My problem
Please run my coding first, and get some view from my coding.
At the movement, I got a problem, I have not idea how to add a table(it is from TableRenderDemo) to JFrame when I click on the button(from DrawCalendar) of the numer 20, and I want the table disply under the buttons(from DrawCalendar).
Please help me to solve this problem, thanks.
*This program for add some buttons and a table on JFrame
import java.awt.*;
import javax.swing.*;public class TestMain extends JFrame{
private static TableRenderDemo tRD;
private static TestMain tM;
protected static Container c;
private static DrawCalendar dC;
public static void main(String[] args){
tM = new TestMain();
tM.setVisible(true);
 public TestMain(){
 super(" Test");
 setSize(800,600);
//set up layoutManager
c=getContentPane();
c.setLayout ( new GridLayout(3,1));
tRD=new TableRenderDemo();
dC=new DrawCalendar();
addItems();//add Buttons to JFrame
private void addItems(){
 c.add(dC); //add Buttons to JFrame
 //c.add(tRD); //add Table to JFrame
*This program for add some buttons to JPanel
*and add listeners to each button
*I want to display myTable under the buttons,
*when I click on number 20, but why it doesn't
*work, The coding for these part are indicated by ??????????????
[import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.GridLayout;
public class DrawCalendar extends JPanel {
 private static DrawCalendar dC;
 private static TestMain tM;
 private static TableRenderDemo myTable;
 private static GridLayout gL;
 private static final int nlen = 35;
 private static String names[] = new String[nlen];
private static JButton buttons[] = new JButton[nlen];
 public DrawCalendar(){
 gL=new GridLayout(5,7,0,0);
 setLayout(gL);
 assignValues();
 addJButton();
 registerListener();
//assign values to each button
 private void assignValues(){
 names = new String[35];
 for(int i = 0; i < names.length; i++)
 names[i] = Integer.toString(i + 1);
//create buttons and add them to Jpanel
private void addJButton(){
 buttons=new JButton[names.length];
 for (int i=0; i<names.length; i++){
 buttons=new JButton(names[i]);
 buttons[i].setBorder(null);
 buttons[i].setBackground(Color.white);
 buttons[i].setFont(new Font ("Palatino", 0,8));
add(buttons[i]);
//add listeners to each button
private void registerListener(){
 for(int i=0; i<35; i++)
 buttons[i].addActionListener(new EventHandler());
//I want to display myTable under the buttons,
//when I click on number 20, but why it doesn't
//work
private class EventHandler implements ActionListener{
 public void actionPerformed(ActionEvent e){
 for(int i=0; i<35; i++){
 if(i==20){ //????????????????????
 tM=new TestMain(); //I want to display myTable under the buttons,
 tM.c.removeAll(); //when I click on number 20, but why it doesn't
 tM.c.add(dC); //work
 tM.c.add(myTable); //???????????????????????????????????????
 tM.validate();
 if(e.getSource()==buttons[i]){
 System.out.println("testing " + names[i]);
 break;
*This program create a table with some data
[import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableColumn;
import javax.swing.DefaultCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class TableRenderDemo extends JScrollPane {
 private boolean DEBUG = true;
 public TableRenderDemo() {
 // super("TableRenderDemo");
 MyTableModel myModel = new MyTableModel();
 JTable table = new JTable(myModel);
 table.setPreferredScrollableViewportSize(new Dimension(700, 70));//500,70
 //Create the scroll pane and add the table to it.
 setViewportView(table);
 //Set up column sizes.
 initColumnSizes(table, myModel);
 //Fiddle with the Sport column's cell editors/renderers.
 setUpSportColumn(table.getColumnModel().getColumn(2));
* This method picks good column sizes.
* If all column heads are wider than the column's cells'
* contents, then you can just use column.sizeWidthToFit().
private void initColumnSizes(JTable table, MyTableModel model) {
TableColumn column = null;
Component comp = null;
int headerWidth = 0;
int cellWidth = 0;
Object[] longValues = model.longValues;
for (int i = 0; i < 5; i++) {
column = table.getColumnModel().getColumn(i);
try {
comp = column.getHeaderRenderer().
getTableCellRendererComponent(
null, column.getHeaderValue(),
false, false, 0, 0);
headerWidth = comp.getPreferredSize().width;
} catch (NullPointerException e) {
System.err.println("Null pointer exception!");
System.err.println(" getHeaderRenderer returns null in 1.3.");
System.err.println(" The replacement is getDefaultRenderer.");
comp = table.getDefaultRenderer(model.getColumnClass(i)).
getTableCellRendererComponent(
table, longValues[i],
false, false, 0, i);
cellWidth = comp.getPreferredSize().width;
if (DEBUG) {
System.out.println("Initializing width of column "
+ i + ". "
+ "headerWidth = " + headerWidth
+ "; cellWidth = " + cellWidth);
//XXX: Before Swing 1.1 Beta 2, use setMinWidth instead.
column.setPreferredWidth(Math.max(headerWidth, cellWidth));
public void setUpSportColumn(TableColumn sportColumn) {
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("Snowboarding");
comboBox.addItem("Rowing");
comboBox.addItem("Chasing toddlers");
comboBox.addItem("Speed reading");
comboBox.addItem("Teaching high school");
comboBox.addItem("None");
sportColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
DefaultTableCellRenderer renderer =
new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
sportColumn.setCellRenderer(renderer);
//Set up tool tip for the sport column header.
TableCellRenderer headerRenderer = sportColumn.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer) {
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the sport to see a list of choices");
class MyTableModel extends AbstractTableModel {
final String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
final Object[][] data = {
{"Mary ", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Chasing toddlers", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Angela", "Lih",
"Teaching high school", new Integer(4), new Boolean(false)}
public final Object[] longValues = {"Angela", "Andrews",
"Teaching high school",
new Integer(20), Boolean.TRUE};
public int getColumnCount() {
return columnNames.length;
public int getRowCount() {
return data.length;
public String getColumnName(int col) {
return columnNames[col];
public Object getValueAt(int row, int col) {
return data[row][col];
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
* Don't need to implement this method unless your table's
* editable.
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
if (col < 2) {
return false;
} else {
return true;
* Don't need to implement this method unless your table's
* data can change.
public void setValueAt(Object value, int row, int col) {
if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value
+ " (an instance of "
+ value.getClass() + ")");
if (data[0][col] instanceof Integer
&& !(value instanceof Integer)) {
//With JFC/Swing 1.1 and JDK 1.2, we need to create
//an Integer from the value; otherwise, the column
//switches to contain Strings. Starting with v 1.3,
//the table automatically converts value to an Integer,
//so you only need the code in the 'else' part of this
//'if' block.
try {
data[row][col] = new Integer(value.toString());
fireTableCellUpdated(row, col);
} catch (NumberFormatException e) {
JOptionPane.showMessageDialog(TableRenderDemo.this,
"The \"" + getColumnName(col)
+ "\" column accepts only integer values.");
} else {
data[row][col] = value;
fireTableCellUpdated(row, col);
if (DEBUG) {
System.out.println("New value of data:");
printDebugData();
private void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount();
for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + data[i][j]);
System.out.println();
System.out.println("--------------------------");

http://forum.java.sun.com/faq.jsp#format

How can i make perticular row or perticular cell Editable of a JTable

Dear al,
can u help me by guiding me for the problem of...
i am having a JTable, in which a (first)column of each row is having a checkbox field.
If the checkbox is checked then and then i should able to modify the cells in that row where the checkbox is.
I have created the table with AbstractTableModel of which the isCellEditable(int row, int col) method is overwriten. Whatever return value (true/false) reflects the perticular
cells becomes editable/non-editable respectively.
but at run time...(mean the table is created now) and now i want to make the cells editable/non-editable depending on the checkbox value...
how can i implement it.........
please suggest.........
thank you.........

here is the sample code from tutorial.......
* TableRenderDemo.java requires no other files.
import java.awt.Component;
import java.awt.Dimension;
import java.awt.GridLayout;
import javax.swing.DefaultCellEditor;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
* TableRenderDemo is just like TableDemo, except that it explicitly initializes
* column sizes and it uses a combo box as an editor for the Sport column.
@SuppressWarnings("serial")
public class TableRenderDemo extends JPanel {
 private boolean DEBUG = true;
 public TableRenderDemo() {
 super(new GridLayout(1, 0));
 JTable table = new JTable(new MyTableModel());
 // table.setEditingColumn(0);
 // table.editCellAt(0, 0);
 table.setPreferredScrollableViewportSize(new Dimension(500, 100));
 // Create the scroll pane and add the table to it.
 JScrollPane scrollPane = new JScrollPane(table);
 // Set up column sizes.
 initColumnSizes(table);
 // Fiddle with the Sport column's cell editors/renderers.
 setUpSportColumn(table, table.getColumnModel().getColumn(2));
 // Add the scroll pane to this panel.
 add(scrollPane);
 * This method picks good column sizes. If all column heads are wider than
 * the column's cells' contents, then you can just use
 * column.sizeWidthToFit().
 private void initColumnSizes(JTable table) {
 MyTableModel model = (MyTableModel) table.getModel();
 TableColumn column = null;
 Component comp = null;
 int headerWidth = 0;
 int cellWidth = 0;
 Object[] longValues = model.longValues;
 TableCellRenderer headerRenderer = table.getTableHeader()
 .getDefaultRenderer();
 for (int i = 0; i < 5; i++) {
 column = table.getColumnModel().getColumn(i);
 comp = headerRenderer.getTableCellRendererComponent(null, column
 .getHeaderValue(), false, false, 0, 0);
 headerWidth = comp.getPreferredSize().width;
 comp = table.getDefaultRenderer(model.getColumnClass(i))
 .getTableCellRendererComponent(table, longValues, false,
 false, 0, i);
 cellWidth = comp.getPreferredSize().width;
 if (DEBUG) {
 System.out.println("Initializing width of column " + i + ". "
 + "headerWidth = " + headerWidth + "; cellWidth = "
 + cellWidth);
 // XXX: Before Swing 1.1 Beta 2, use setMinWidth instead.
 column.setPreferredWidth(Math.max(headerWidth, cellWidth));
 public void setUpSportColumn(JTable table, TableColumn sportColumn) {
 // Set up the editor for the sport cells.
 JComboBox comboBox = new JComboBox();
 comboBox.addItem("Snowboarding");
 comboBox.addItem("Rowing");
 comboBox.addItem("Knitting");
 comboBox.addItem("Speed reading");
 comboBox.addItem("Pool");
 comboBox.addItem("None of the above");
 sportColumn.setCellEditor(new DefaultCellEditor(comboBox));
 // Set up tool tips for the sport cells.
 DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
 renderer.setToolTipText("Click for combo box");
 sportColumn.setCellRenderer(renderer);
 class MyTableModel extends AbstractTableModel {
 private String[] columnNames = { "First Name", "Last Name", "Sport",
 "# of Years", "Vegetarian" };
 private Object[][] data = {
 { "Mary", "Campione", "Snowboarding", new Integer(5),
 new Boolean(false) },
 { "Alison", "Huml", "Rowing", new Integer(3), new Boolean(true) },
 { "Kathy", "Walrath", "Knitting", new Integer(2),
 new Boolean(false) },
 { "Sharon", "Zakhour", "Speed reading", new Integer(20),
 new Boolean(true) },
 { "Philip", "Milne", "Pool", new Integer(10),
 new Boolean(false) } };
 public final Object[] longValues = { "Sharon", "Campione",
 "None of the above", new Integer(20), Boolean.TRUE };
 public int getColumnCount() {
 return columnNames.length;
 public int getRowCount() {
 return data.length;
 public String getColumnName(int col) {
 return columnNames[col];
 public Object getValueAt(int row, int col) {
 return data[row][col];
 * JTable uses this method to determine the default renderer/ editor for
 * each cell. If we didn't implement this method, then the last column
 * would contain text ("true"/"false"), rather than a check box.
 public Class<?> getColumnClass(int c) {
 return getValueAt(0, c).getClass();
 * Don't need to implement this method unless your table's editable.
 public boolean isCellEditable(int row, int col) {
 // Note that the data/cell address is constant,
 // no matter where the cell appears onscreen.
 // return false;
 return true;
 * Don't need to implement this method unless your table's data can
 * change.
 public void setValueAt(Object value, int row, int col) {
 if (DEBUG) {
 System.out.println("Setting value at " + row + "," + col
 + " to " + value + " (an instance of "
 + value.getClass() + ")");
 data[row][col] = value;
 fireTableCellUpdated(row, col);
 if (DEBUG) {
 System.out.println("New value of data:");
 printDebugData();
 private void printDebugData() {
 int numRows = getRowCount();
 int numCols = getColumnCount();
 for (int i = 0; i < numRows; i++) {
 System.out.print(" row " + i + ":");
 for (int j = 0; j < numCols; j++) {
 System.out.print(" " + data[i][j]);
 System.out.println();
 System.out.println("--------------------------");
 * Create the GUI and show it. For thread safety, this method should be
 * invoked from the event-dispatching thread.
 private static void createAndShowGUI() {
 // Create and set up the window.
 JFrame frame = new JFrame("TableRenderDemo");
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 // Create and set up the content pane.
 TableRenderDemo newContentPane = new TableRenderDemo();
 newContentPane.setOpaque(true); // content panes must be opaque
 frame.setContentPane(newContentPane);
 // Display the window.
 frame.pack();
 frame.setVisible(true);
 public static void main(String[] args) {
 // Schedule a job for the event-dispatching thread:
 // creating and showing this application's GUI.
 javax.swing.SwingUtilities.invokeLater(new Runnable() {
 public void run() {
 createAndShowGUI();

How to use cell editors in JTree?

Hi,
I have a component where I am placing JTable in JTree node.The table cells should be editable.
I was unable to do that.
I am giving code for 2 classes below,which I used.
To test this compile the classes seperately.
/**************************TableInTree.java(main class)**************/
import java.awt.Component;
import javax.swing.*;
import javax.swing.tree.*;
import java.util.*;
public class TableInTree extends JFrame
public TableInTree()
super("TableInTree");
JTree tree = new JTree(this.createTreeModel());
tree.setCellRenderer(new ResultTreeCellRenderer());
tree.setEditable(true);
this.getContentPane().add(new JScrollPane(tree));
public static void main(String[] args)
TableInTree frame = new TableInTree();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(800, 600);
frame.show();
// * Method createRootNodes.
private TreeModel createTreeModel()
DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");
DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("test1");
node1.add(new DefaultMutableTreeNode(new TableRenderDemo)));
root.add(node1);
root.add(new DefaultMutableTreeNode("test2"));
return new DefaultTreeModel(root, true);
public static class ResultTreeCellRenderer extends DefaultTreeCellRenderer
public Component getTreeCellRendererComponent(JTree t, Object value,boolean s, boolean o,boolean l, int r, boolean h)
if (value instanceof DefaultMutableTreeNode)
DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
if (node.getUserObject() instanceof TableRenderDemo)
return new JScrollPane((TableRenderDemo) node.getUserObject());
return super.getTreeCellRendererComponent(t, value, s, o, l, r, h);
/*******************TreeRenderDemo.java**************************/
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.table.*;
import java.awt.*;
* TableRenderDemo is just like TableDemo, except that it
* explicitly initializes column sizes and it uses a combo box
* as an editor for the Sport column.
public class TableRenderDemo extends JPanel {
private boolean DEBUG = false;
public TableRenderDemo() {
super(new GridLayout(1,0));
JTable table = new JTable(new MyTableModel());
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
//Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table);
//Set up column sizes.
initColumnSizes(table);
//Fiddle with the Sport column's cell editors/renderers.
setUpSportColumn(table, table.getColumnModel().getColumn(2));
//Add the scroll pane to this panel.
add(scrollPane);
* This method picks good column sizes.
* If all column heads are wider than the column's cells'
* contents, then you can just use column.sizeWidthToFit().
private void initColumnSizes(JTable table) {
MyTableModel model = (MyTableModel)table.getModel();
TableColumn column = null;
Component comp = null;
int headerWidth = 0;
int cellWidth = 0;
Object[] longValues = model.longValues;
TableCellRenderer headerRenderer =
((JTableHeader)table.getTableHeader()).getDefaultRenderer();
for (int i = 0; i < 5; i++) {
column = table.getColumnModel().getColumn(i);
comp = headerRenderer.getTableCellRendererComponent(
null, column.getHeaderValue(),
false, false, 0, 0);
headerWidth = comp.getPreferredSize().width;
comp = table.getDefaultRenderer(model.getColumnClass(i)).
getTableCellRendererComponent(
table, longValues,
false, false, 0, i);
cellWidth = comp.getPreferredSize().width;
if (DEBUG) {
System.out.println("Initializing width of column "
+ i + ". "
+ "headerWidth = " + headerWidth
+ "; cellWidth = " + cellWidth);
//XXX: Before Swing 1.1 Beta 2, use setMinWidth instead.
column.setPreferredWidth(Math.max(headerWidth, cellWidth));
public void setUpSportColumn(JTable table,
TableColumn sportColumn) {
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("Snowboarding");
comboBox.addItem("Rowing");
comboBox.addItem("Knitting");
comboBox.addItem("Speed reading");
comboBox.addItem("Pool");
comboBox.addItem("None of the above");
sportColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
DefaultTableCellRenderer renderer =
new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
sportColumn.setCellRenderer(renderer);
class MyTableModel extends AbstractTableModel {
private String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
private Object[][] data = {
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)}
public final Object[] longValues = {"Sharon", "Campione",
"None of the above",
new Integer(20), Boolean.TRUE};
public int getColumnCount() {
return columnNames.length;
public int getRowCount() {
return data.length;
public String getColumnName(int col) {
return columnNames[col];
public Object getValueAt(int row, int col) {
return data[row][col];
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
* Don't need to implement this method unless your table's
* editable.
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
if (col < 2) {
return false;
} else {
return true;
* Don't need to implement this method unless your table's
* data can change.
public void setValueAt(Object value, int row, int col) {
if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value
+ " (an instance of "
+ value.getClass() + ")");
data[row][col] = value;
fireTableCellUpdated(row, col);
if (DEBUG) {
System.out.println("New value of data:");
printDebugData();
private void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount();
for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + data[j]);
System.out.println();
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
private static void createAndShowGUI() {
//Make sure we have nice window decorations.
//JFrame.setDefaultLookAndFeelDecorated(true);
//Create and set up the window.
JFrame frame = new JFrame("TableRenderDemo");
//frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
TableRenderDemo newContentPane = new TableRenderDemo();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setVisible(true);
Please give me a solution.
thanks in advance

rebounce

Help for adjusting columns of a JTAble in a Table Model

Hello community,
In order to have a good display of by DataBase in a JTable, I've wrote some code to adjust columns in function of datas. Those datas are displayed with a TableModel ( which I've declared in a class JDBCAdapter ).
When I start my application, I call adjustColumns(), and all is great but when I add information to my DB and display it, the columns of my JTable return to default width...
So I want to incorporate my function adjustColumns in my TableModel, and I need help...
 void adjustColumns()
 // Ajuste les colonnes aux donnes pour que tout soit visible
 int nbRow,nbCol;
 nbRow = JTable1.getRowCount();
 nbCol = test.getColumnCount();
 for ( int i = 0; i < nbCol; i++ )
 com.sun.java.swing.table.TableColumn column = null;
 column = JTable1.getColumnModel().getColumn(i);
 int dataLength = 0;
 for ( int j = 0; j< nbRow; j++ )
 FontMetrics fm;
 int dataLengthTmp;
 String valueTable;
 fm = JTable1.getFontMetrics(JTable1.getFont());
 if ( test.getValueAt(j, i) == null )
 System.out.println("Valeur nulle...");
 dataLengthTmp = 0;
 else
 valueTable = test.getValueAt(j, i).toString();
 dataLengthTmp = fm.stringWidth(valueTable);
 System.out.println(valueTable + " = " + dataLengthTmp);
 if ( dataLengthTmp > dataLength )
 dataLength = dataLengthTmp;
 if ( dataLength != 0 )
column.setWidth(dataLength + 5);
else
column.sizeWidthToFit();
JTable1.setModel(test);
JTable1.repaint();
import java.util.Vector;
import java.sql.*;
import com.sun.java.swing.table.AbstractTableModel;
import com.sun.java.swing.event.TableModelEvent;
public class JDBCAdapter extends AbstractTableModel {
Connection connection;
Statement statement;
ResultSet resultSet;
String[] columnNames = {};
Vector rows = new Vector();
ResultSetMetaData metaData;
public JDBCAdapter(String url, String driverName,
String user, String passwd) {
try {
Class.forName(driverName);
System.out.println("Ouverture de la connexion a la base de donnee...");
connection = DriverManager.getConnection(url, user, passwd);
statement = connection.createStatement();
catch (ClassNotFoundException ex) {
System.err.println("Cannot find the database driver classes.");
System.err.println(ex);
catch (SQLException ex) {
System.err.println("Cannot connect to this database.");
System.err.println(ex);
public void executeQuery(String query) {
if (connection == null || statement == null) {
System.err.println("There is no database to execute the query.");
return;
try {
resultSet = statement.executeQuery(query);
metaData = resultSet.getMetaData();
int numberOfColumns = metaData.getColumnCount();
columnNames = new String[numberOfColumns];
// Get the column names and cache them.
// Then we can close the connection.
for(int column = 0; column < numberOfColumns; column++) {
columnNames[column] = metaData.getColumnLabel(column+1);
// Get all rows.
rows = new Vector();
while (resultSet.next()) {
Vector newRow = new Vector();
for (int i = 1; i <= getColumnCount(); i++) {
newRow.addElement(resultSet.getObject(i));
rows.addElement(newRow);
// close(); Need to copy the metaData, bug in jdbc:odbc driver.
fireTableChanged(null); // Tell the listeners a new table has arrived.
catch (SQLException ex) {
System.err.println(ex+" query = "+query);
public void executeUpdate(String query) {
if (connection == null || statement == null) {
System.err.println("There is no database to execute the query.");
return;
try {
statement.executeUpdate(query);
// close(); Need to copy the metaData, bug in jdbc:odbc driver.
fireTableChanged(null); // Tell the listeners a new table has arrived.
catch (SQLException ex) {
System.err.println(ex+" query = "+query);
public void close() throws SQLException {
System.out.println("Fermeture de la connection a la base de donnee... Bye !");
resultSet.close();
statement.close();
connection.close();
protected void finalize() throws Throwable {
close();
super.finalize();
// Implementation of the TableModel Interface
// MetaData
public String getColumnName(int column) {
if (columnNames[column] != null) {
return columnNames[column];
} else {
return "";
public Class getColumnClass(int column) {
int type;
try {
type = metaData.getColumnType(column+1);
catch (SQLException e) {
return super.getColumnClass(column);
switch(type) {
case Types.CHAR:
case Types.VARCHAR:
case Types.LONGVARCHAR:
return String.class;
case Types.BIT:
return Boolean.class;
case Types.TINYINT:
case Types.SMALLINT:
case Types.INTEGER:
return Integer.class;
case Types.BIGINT:
return Long.class;
case Types.FLOAT:
case Types.DOUBLE:
return Double.class;
case Types.DATE:
return java.sql.Date.class;
default:
return Object.class;
public boolean isCellEditable(int row, int column) {
try {
return metaData.isWritable(column+1);
catch (SQLException e) {
return false;
public int getColumnCount() {
return columnNames.length;
// Data methods
public int getRowCount() {
return rows.size();
public Object getValueAt(int aRow, int aColumn) {
Vector row = (Vector)rows.elementAt(aRow);
return row.elementAt(aColumn);
public String dbRepresentation(int column, Object value) {
int type;
if (value == null) {
return "null";
try {
type = metaData.getColumnType(column+1);
catch (SQLException e) {
return value.toString();
switch(type) {
case Types.INTEGER:
case Types.DOUBLE:
case Types.FLOAT:
return value.toString();
case Types.BIT:
return ((Boolean)value).booleanValue() ? "1" : "0";
case Types.DATE:
return value.toString(); // This will need some conversion.
default:
return "\""+value.toString()+"\"";
public void setValueAt(Object value, int row, int column) {
try {
String tableName = metaData.getTableName(column+1);
// Some of the drivers seem buggy, tableName should not be null.
if (tableName == null) {
System.out.println("Table name returned null.");
String columnName = getColumnName(column);
String query =
"update "+tableName+
" set "+columnName+" = "+dbRepresentation(column, value)+
" where ";
// We don't have a model of the schema so we don't know the
// primary keys or which columns to lock on. To demonstrate
// that editing is possible, we'll just lock on everything.
for(int col = 0; col<getColumnCount(); col++) {
String colName = getColumnName(col);
if (colName.equals("")) {
continue;
if (col != 0) {
query = query + " and ";
query = query + colName +" = "+
dbRepresentation(col, getValueAt(row, col));
System.out.println(query);
System.out.println("Not sending update to database");
// statement.executeQuery(query);
catch (SQLException e) {
// e.printStackTrace();
System.err.println("Update failed");
Vector dataRow = (Vector)rows.elementAt(row);
dataRow.setElementAt(value, column);
Thanks to help me.

Hi,
OK. I have read your code sample again. It looks like the JDBCAdapter class is reloading table data in the executeQuery method. Why not call adjustColumns at the end of this method after the new rows and columns are loaded? Perhaps it also should be called at the end of executeUpdate. Have you tried doing that?
I would still set
JTable1.setAutoCreateColumnsFromModel (false); to prevent Java from readjusting the size automatically at some other time.
regards,
Terry

JTable and the ****** TableModel

Ok, I know I'm messing with all of these threads about table and table model but there is no way for me to understand:
I do
MyTable table = new MyTable( rowData, column );
public class MyTable extends JTabel {
MyTableModel myMod = null;
public MyTable( Vector vec1, Vector vec2 ) {
super();
myMod = new MyModel( vec1, vec2 );
setModel( myMod);
public class MyModel extends DefaultTableModel {
public MyModel( Vector vec1, Vector vec2 ) { super(vec1,vec2); }
but my tables are empty (1)
and I can't add rows (2)
Why? I'm messing with this for a lot.. could some one very kind post a bit of code that make me understand what is right and what is not right?
thanks in advance

Try this out, and you will probably figure out what you're doing wrong.
* TableRenderDemo.java is a 1.4 application that requires no other files.
import javax.swing.DefaultCellEditor;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.GridLayout;
* TableRenderDemo is just like TableDemo, except that it
* explicitly initializes column sizes and it uses a combo box
* as an editor for the Sport column.
public class TableRenderDemo extends JPanel {
 private boolean DEBUG = false;
 public TableRenderDemo() {
 super(new GridLayout(1,0));
 JTable table = new JTable(new MyTableModel());
 table.setPreferredScrollableViewportSize(new Dimension(500, 70));
 //Create the scroll pane and add the table to it.
 JScrollPane scrollPane = new JScrollPane(table);
 //Set up column sizes.
 initColumnSizes(table);
 //Fiddle with the Sport column's cell editors/renderers.
 setUpSportColumn(table, table.getColumnModel().getColumn(2));
 //Add the scroll pane to this panel.
 add(scrollPane);
 * This method picks good column sizes.
 * If all column heads are wider than the column's cells'
 * contents, then you can just use column.sizeWidthToFit().
 private void initColumnSizes(JTable table) {
 MyTableModel model = (MyTableModel)table.getModel();
 TableColumn column = null;
 Component comp = null;
 int headerWidth = 0;
 int cellWidth = 0;
 Object[] longValues = model.longValues;
 TableCellRenderer headerRenderer =
 table.getTableHeader().getDefaultRenderer();
 for (int i = 0; i < 5; i++) {
 column = table.getColumnModel().getColumn(i);
 comp = headerRenderer.getTableCellRendererComponent(
 null, column.getHeaderValue(),
 false, false, 0, 0);
 headerWidth = comp.getPreferredSize().width;
 comp = table.getDefaultRenderer(model.getColumnClass(i)).
 getTableCellRendererComponent(
 table, longValues,
false, false, 0, i);
cellWidth = comp.getPreferredSize().width;
if (DEBUG) {
System.out.println("Initializing width of column "
+ i + ". "
+ "headerWidth = " + headerWidth
+ "; cellWidth = " + cellWidth);
//XXX: Before Swing 1.1 Beta 2, use setMinWidth instead.
column.setPreferredWidth(Math.max(headerWidth, cellWidth));
public void setUpSportColumn(JTable table,
TableColumn sportColumn) {
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("Snowboarding");
comboBox.addItem("Rowing");
comboBox.addItem("Knitting");
comboBox.addItem("Speed reading");
comboBox.addItem("Pool");
comboBox.addItem("None of the above");
sportColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
DefaultTableCellRenderer renderer =
new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
sportColumn.setCellRenderer(renderer);
class MyTableModel extends AbstractTableModel {
private String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
private Object[][] data = {
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)}
public final Object[] longValues = {"Sharon", "Campione",
"None of the above",
new Integer(20), Boolean.TRUE};
public int getColumnCount() {
return columnNames.length;
public int getRowCount() {
return data.length;
public String getColumnName(int col) {
return columnNames[col];
public Object getValueAt(int row, int col) {
return data[row][col];
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
* Don't need to implement this method unless your table's
* editable.
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
if (col < 2) {
return false;
} else {
return true;
* Don't need to implement this method unless your table's
* data can change.
public void setValueAt(Object value, int row, int col) {
if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value
+ " (an instance of "
+ value.getClass() + ")");
data[row][col] = value;
fireTableCellUpdated(row, col);
if (DEBUG) {
System.out.println("New value of data:");
printDebugData();
private void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount();
for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + data[i][j]);
System.out.println();
System.out.println("--------------------------");
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
private static void createAndShowGUI() {
//Make sure we have nice window decorations.
JFrame.setDefaultLookAndFeelDecorated(true);
//Create and set up the window.
JFrame frame = new JFrame("TableRenderDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
TableRenderDemo newContentPane = new TableRenderDemo();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setVisible(true);
public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
Good luck!!

JTable getColumnName not working with numbered rows

you know when you read through the same code for a day and can't find the problem but someone who has never seen it before can find the problem in a second? i've got that going on right now.
I saw a thread, http://forum.java.sun.com/thread.jspa?forumID=57&threadID=639189 , where rows numbers are neatly added to a JTable by camickr, after I implemented this I can't get my data or ColumnHeaders to line up with the corrent columns. I have three columns, { Integer, Integer, JComboBox } it's kind of an old post but I was just wondering if any one else had run into the problem.
Also when I insert a new row { Integer, Integer, "Combo Option" } it is inserted into the table as { Integer, "Combo Option", Integer }, this isn't a real high priority but any help would be appreciated, thanks.

I tried to shorten this up as much as possible, sorry but it is still kind of big:
//Main class
import java.awt.*;
import java.awt.event.*;
public class TableProblem extends javax.swing.JFrame
 BoreDataJTable table;
 javax.swing.JScrollPane jsp;
 public TableProblem()
 BoreDataDefaultTableModel model = new BoreDataDefaultTableModel( 0, 3 );
 table = new BoreDataJTable( model );
 table.getTableHeader().setReorderingAllowed( false );
 jsp = new javax.swing.JScrollPane( table );
 jsp.setViewportView( table );
 this.setContentPane( jsp );
 public static void main(String args[])
 System.out.println("Starting App");
 TableProblem f = new TableProblem();
 f.setSize(300,100);
 f.show();
//JTable class
import javax.swing.*;
import javax.swing.table.*;
import java.awt.Component;
public class BoreDataJTable extends JTable
 public BoreDataJTable( TableModel tm )
 super( tm );
 setAutoCreateColumnsFromModel( false );
 setAutoscrolls( false );
 addColumn( new TableColumn() );
 getColumnModel().getColumn(0).setCellRenderer( this.getTableHeader().getDefaultRenderer() );
 getColumnModel().getColumn(0).setPreferredWidth( 25 );
 getColumnModel().getColumn(0).setCellEditor( null );
 getColumnModel().getColumn(0).setResizable( false );
 getColumnModel().getColumn(1).sizeWidthToFit();
 getColumnModel().getColumn(2).sizeWidthToFit();
 setPreferredScrollableViewportSize( getPreferredSize() );
 initGroundColumn( this.getColumnModel().getColumn(3) );
 public boolean isCellEditable(int row, int column)
 if( column < 3 )
 return false;
 else
 return true;
 public Object getValueAt( int row, int col )
 if( col == 0)
 return new Integer( row + 1 );
 else
 DefaultTableModel model = ( ( DefaultTableModel )(
 this.getModel() ) );
 return model.getValueAt( row, col - 1 );
 public void initGroundColumn( TableColumn groundColumn )
 JComboBox comboBox = new JComboBox();
 comboBox.addItem( "Select" );
 comboBox.addItem( "Top Soil" );
 comboBox.addItem( "Clay" );
 comboBox.addItem( "Sand" );
 comboBox.addItem( "Gravel" );
 comboBox.addItem( "Pit Run" );
 comboBox.addItem( "Sand Stone" );
 comboBox.addItem( "Bed Rock" );
 groundColumn.setCellEditor(new DefaultCellEditor(comboBox));
 DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
 renderer.setToolTipText("Select Ground Type");
 groundColumn.setCellRenderer(renderer);
//DefaultTableModel class
import javax.swing.table.*;
import javax.swing.*;
public class BoreDataDefaultTableModel extends DefaultTableModel
 private final Object[] emptyRow = { new Integer(0), new Integer(0), "Select" };
 private final String[] colNames = { null, "Depth (cm)", "Angel (%)", "Ground" };
 int cols;
 int rows;
 public BoreDataDefaultTableModel( int rows, int cols )
 super( rows, cols );
 this.rows = rows;
 this.cols = cols;
 addRow( emptyRow );
 public String getColumnName( int col )
 return colNames[col];
}The problem is that when the JComboBox is changed, it changes the value in the "Depth" to the the JComboBox's value, also it doesn't correctly display the ColumnHeader for the JComboBox's column

Problem in adding JComboBox in JTable

Hi,
I was trying to put some comboxes in a jtable. The problem is I am not able to add combo boxes in the 1st and 2nd column. But its adding from the 3rd column. What can be wrong in the following code?
import javax.swing.DefaultCellEditor;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.GridLayout;
import javax.swing.*;
* TableRenderDemo is just like TableDemo, except that it
* explicitly initializes column sizes and it uses a combo box
* as an editor for the Sport column.
public class TableRenderDemo1 extends JPanel {
 private boolean DEBUG = true;
 DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
 public TableRenderDemo1() {
 //super(new GridLayout(1,0));
 JTable table = new JTable(new MyTableModel());
 table.setPreferredScrollableViewportSize(new Dimension(500, 250));
 //Create the scroll pane and add the table to it.
 JScrollPane scrollPane = new JScrollPane(table);
 //Set up column sizes.
 initColumnSizes(table);
 //Fiddle with the Sport column's cell editors/renderers.
 setUpNameColumn(table, table.getColumnModel().getColumn(3));
 //Fiddle with the Sport column's cell editors/renderers.
 setUpSportColumn(table, table.getColumnModel().getColumn(4));
 //Add the scroll pane to this panel.
 add(scrollPane);
 String strPlaf = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
 try {
 UIManager.setLookAndFeel(strPlaf);
 SwingUtilities.updateComponentTreeUI(scrollPane);
 } catch(Exception e) {
 e.printStackTrace();
 * This method picks good column sizes.
 * If all column heads are wider than the column's cells'
 * contents, then you can just use column.sizeWidthToFit().
 private void initColumnSizes(JTable table) {
 MyTableModel model = (MyTableModel)table.getModel();
 TableColumn column = null;
 Component comp = null;
 int headerWidth = 0;
 int cellWidth = 0;
 Object[] longValues = model.longValues;
 TableCellRenderer headerRenderer = table.getTableHeader().getDefaultRenderer();
 for (int i = 0; i < 5; i++) {
 column = table.getColumnModel().getColumn(i);
 comp = headerRenderer.getTableCellRendererComponent(
 null, column.getHeaderValue(),
 false, false, 0, 0);
 headerWidth = comp.getPreferredSize().width;
 comp = table.getDefaultRenderer(model.getColumnClass(i)).
 getTableCellRendererComponent(
 table, longValues,
false, false, 0, i);
cellWidth = comp.getPreferredSize().width;
if (DEBUG) {
System.out.println("Initializing width of column "
+ i + ". "
+ "headerWidth = " + headerWidth
+ "; cellWidth = " + cellWidth);
//XXX: Before Swing 1.1 Beta 2, use setMinWidth instead.
column.setPreferredWidth(Math.max(headerWidth, cellWidth));
public void setUpSportColumn(JTable table, TableColumn sportColumn) {
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("Snowboarding");
comboBox.addItem("Rowing");
comboBox.addItem("Knitting");
comboBox.addItem("Speed reading");
comboBox.addItem("Pool");
comboBox.addItem("None of the above");
comboBox.setVisible(true);
sportColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
renderer.setToolTipText("Click for combo box");
sportColumn.setCellRenderer(renderer);
public void setUpNameColumn(JTable table, TableColumn nameColumn) {
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("One");
comboBox.addItem("Two");
comboBox.addItem("Three");
comboBox.addItem("Four");
comboBox.addItem("Five");
comboBox.setVisible(true);
nameColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
renderer.setToolTipText("Click for combo box");
nameColumn.setCellRenderer(renderer);
class MyTableModel extends AbstractTableModel {
private String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
private Object[][] data = {
{"Mary", "Saikat", "Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Srinath", "Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Sheela", "Knitting", new Integer(2), new Boolean(false)},
{"John", "Yashwant", "Something", new Integer(5), new Boolean(true)},
{"Harry", "Jay", "Playing", new Integer(1), new Boolean(true)},
public final Object[] longValues = {"Sharon", "Campione",
"None of the above",
new Integer(20), Boolean.TRUE};
public int getColumnCount() {
return columnNames.length;
public int getRowCount() {
return data.length;
public String getColumnName(int col) {
return columnNames[col];
public Object getValueAt(int row, int col) {
return data[row][col];
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
* Don't need to implement this method unless your table's
* editable.
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
if (col < 2) {
return false;
} else {
return true;
* Don't need to implement this method unless your table's
* data can change.
public void setValueAt(Object value, int row, int col) {
if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value
+ " (an instance of "
+ value.getClass() + ")");
data[row][col] = value;
fireTableCellUpdated(row, col);
if (DEBUG) {
System.out.println("New value of data:");
printDebugData();
private void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount();
for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + data[i][j]);
System.out.println();
System.out.println("--------------------------");
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("TableRenderDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
TableRenderDemo1 newContentPane = new TableRenderDemo1();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setVisible(true);
public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
Thanks in advance.

First, I don't see where you are tying to set the combo box on the first two columns. I only see it for the 3 and 4.
Also why are you putting combo boxes in columns that are not editable:
 public boolean isCellEditable(int row, int col) {
 //Note that the data/cell address is constant,
 //no matter where the cell appears onscreen.
 if (col < 2) {
 return false;
 } else {
 return true;
 }

How to add a table(from TableRenderDemo) to a JFrame?

Hello:
Please run my coding first, and get some idea what's going on for my coding.
At the movement, I got a problem, I have not idea how to add a table(it is from TableRenderDemo) to JFrame when I click on the button(from DrawCalendar) of the numer 20, and I want the table disply under the buttons(from DrawCalendar).
Please help me to solve this problem, thanks.
/* this program for adding some Button to JPanel, and also adding some listeners to each button
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.GridLayout;
public class DrawCalendar extends JPanel {
private static DrawCalendar dC;
private static GridLayout gL;
private static Container c;
private static String names[]={"1","2","3","4","5","6","7","8","9","10","11","12","13","14",
"15","16","17","18","19","20","21","22","23","24","25","26",
"27","28","29","30","31","32","33","34","35"};
private static String num;
private static JButton buttons[];
public DrawCalendar(){
gL=new GridLayout(5,7,0,0);
setLayout(gL);
addJButton(); //add buttons to Panel
registerListener();//add Listener to buttons
//add Buttons to JButtons and put the label for each button
private void addJButton(){
buttons=new JButton[names.length];
for (int i=0; i<names.length; i++){
buttons=new JButton(names);
buttons.setBorder(null);
buttons.setBackground(Color.white);
buttons.setFont(new Font ("Palatino", 0,8));
add(buttons);
private void registerListener(){
for(int i=0; i<35; i++)
buttons.addActionListener(new EventHandler());//add EventHandler to each button
private class EventHandler implements ActionListener{
public void actionPerformed(ActionEvent e){
for(int i=0; i<35; i++){
if(e.getSource()==buttons){
System.out.println("testing " + names);
break;
/*The program for adding a table to JPanel
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableColumn;
import javax.swing.DefaultCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.JScrollPane;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.JOptionPane;
import java.awt.*;
import java.awt.event.*;
public class TableRenderDemo extends JScrollPane {
private boolean DEBUG = true;
public TableRenderDemo() {
// super("TableRenderDemo");
MyTableModel myModel = new MyTableModel();
JTable table = new JTable(myModel);
table.setPreferredScrollableViewportSize(new Dimension(700, 70));//500,70
//Create the scroll pane and add the table to it.
//JScrollPane scrollPane = new JScrollPane(table);
setViewportView(table);
//Set up column sizes.
initColumnSizes(table, myModel);
//Fiddle with the Sport column's cell editors/renderers.
setUpSportColumn(table.getColumnModel().getColumn(2));
//Add the scroll pane to this window.
//getContentPane().add(scrollPane, BorderLayout.CENTER);
// addWindowListener(new WindowAdapter() {
// public void windowClosing(WindowEvent e) {
// System.exit(0);
* This method picks good column sizes.
* If all column heads are wider than the column's cells'
* contents, then you can just use column.sizeWidthToFit().
private void initColumnSizes(JTable table, MyTableModel model) {
TableColumn column = null;
Component comp = null;
int headerWidth = 0;
int cellWidth = 0;
Object[] longValues = model.longValues;
for (int i = 0; i < 5; i++) {
column = table.getColumnModel().getColumn(i);
try {
comp = column.getHeaderRenderer().
getTableCellRendererComponent(
null, column.getHeaderValue(),
false, false, 0, 0);
headerWidth = comp.getPreferredSize().width;
} catch (NullPointerException e) {
System.err.println("Null pointer exception!");
System.err.println(" getHeaderRenderer returns null in 1.3.");
System.err.println(" The replacement is getDefaultRenderer.");
comp = table.getDefaultRenderer(model.getColumnClass(i)).
getTableCellRendererComponent(
table, longValues,
false, false, 0, i);
cellWidth = comp.getPreferredSize().width;
if (DEBUG) {
System.out.println("Initializing width of column "
+ i + ". "
+ "headerWidth = " + headerWidth
+ "; cellWidth = " + cellWidth);
//XXX: Before Swing 1.1 Beta 2, use setMinWidth instead.
column.setPreferredWidth(Math.max(headerWidth, cellWidth));
public void setUpSportColumn(TableColumn sportColumn) {
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("Snowboarding");
comboBox.addItem("Rowing");
comboBox.addItem("Chasing toddlers");
comboBox.addItem("Speed reading");
comboBox.addItem("Teaching high school");
comboBox.addItem("None");
sportColumn.setCellEditor(new DefaultCellEditor(comboBox));
//Set up tool tips for the sport cells.
DefaultTableCellRenderer renderer =
new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
sportColumn.setCellRenderer(renderer);
//Set up tool tip for the sport column header.
TableCellRenderer headerRenderer = sportColumn.getHeaderRenderer();
if (headerRenderer instanceof DefaultTableCellRenderer) {
((DefaultTableCellRenderer)headerRenderer).setToolTipText(
"Click the sport to see a list of choices");
class MyTableModel extends AbstractTableModel {
final String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
final Object[][] data = {
{"Mary ", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Chasing toddlers", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Angela", "Lih",
"Teaching high school", new Integer(4), new Boolean(false)}
public final Object[] longValues = {"Angela", "Andrews",
"Teaching high school",
new Integer(20), Boolean.TRUE};
public int getColumnCount() {
return columnNames.length;
public int getRowCount() {
return data.length;
public String getColumnName(int col) {
return columnNames[col];
public Object getValueAt(int row, int col) {
return data[row][col];
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
* Don't need to implement this method unless your table's
* editable.
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
if (col < 2) {
return false;
} else {
return true;
* Don't need to implement this method unless your table's
* data can change.
public void setValueAt(Object value, int row, int col) {
if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value
+ " (an instance of "
+ value.getClass() + ")");
if (data[0][col] instanceof Integer
&& !(value instanceof Integer)) {
//With JFC/Swing 1.1 and JDK 1.2, we need to create
//an Integer from the value; otherwise, the column
//switches to contain Strings. Starting with v 1.3,
//the table automatically converts value to an Integer,
//so you only need the code in the 'else' part of this
//'if' block.
try {
data[row][col] = new Integer(value.toString());
fireTableCellUpdated(row, col);
} catch (NumberFormatException e) {
JOptionPane.showMessageDialog(TableRenderDemo.this,
"The \"" + getColumnName(col)
+ "\" column accepts only integer values.");
} else {
data[row][col] = value;
fireTableCellUpdated(row, col);
if (DEBUG) {
System.out.println("New value of data:");
printDebugData();
private void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount();
for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + data[j]);
System.out.println();
System.out.println("--------------------------");
*This is a main progarm, it is for adding some buttons to Frame
import java.awt.*;
import javax.swing.*;
public class TestMain extends JFrame{
private static TableRenderDemo tRD;
private static TestMain tM;
private static Container c;
private static DrawCalendar dC;
public static void main(String[] args){
tM = new TestMain();
tM.setVisible(true);
public TestMain(){
super(" Test");
setSize(800,600);
//set up layoutManager
c=getContentPane();
c.setLayout ( new GridLayout(3,1));
tRD=new TableRenderDemo();
dC=new DrawCalendar();
addItems();//add Buttons to JFrame
private void addItems(){
//c.add(dC); //add Buttons to JFrame
c.add(tRD); //add Table to JFrame

http://forum.java.sun.com/faq.jsp#format

Adjusting JTable column width

I want to set the width of one column and let the other columns have the rest of the width in the table. Right now I am doing this by setting the width of each column. But can someone please tell me if it is possible to do programmatically.
I have tried to use sizeWidthToFit(). But it does not work. I have also set the headers to null.
Thanks,
sjl

hi Mark,
you can try C_CELL_TD_EXTEND
e.g C_CELL_TD_EXTEND = 'width=200'.
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/b1089290-0201-0010-288c-98e4d26487ee
Extension of TD tag
Here you can set the properties such as the width, height, alignment or color of the cell. This parameter is not normally set because many of the properties are already defined when the style is defined.
hope this helps.

Autosizing Column Headers

Hi all,
I am trying to use a list in the left hand side of a split pane and a table in the right hand side of the same split pane.
Both the list and the table are in scroll panes.
At the moment I am trying to have the table appear with column headings large enough to accommodate their names at runtime.
Can someone please tell me why the following code doesn't do this?
There is obviously more code which I can post if this is not the relevant section. Apologies in advance if that is the case.
 public AvailableDocumentsPanel() {
 // summary table in right scroll pane
 summaryTable = new JTable(data, colHeadings);
 // resize columns to size of headers.
 for (int i = 0; i < summaryTable.getColumnCount(); i++) {
 summaryTable.getColumnModel().getColumn(i).sizeWidthToFit();
 summaryTable.setFillsViewportHeight(true);
 rightScrollPane = new JScrollPane(summaryTable);
 // list in left scroll pane
 vocationList = new JList(vocations);
 vocationList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
 vocationList.setSelectedIndex(0);
 leftScrollPane = new JScrollPane(vocationList);
 // add left and right scroll panes to split pane
 summarySplitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,leftScrollPane, rightScrollPane);
 // add split pane to Panel.
 this.add(summarySplitPane);
 }

Swing forum: http://forum.java.sun.com/forum.jspa?forumID=57

JProgressBar Shows Up Too Late--How Do I Update the Display Immediately?

My application has a split pane, the bottom page of which is a panel containing an image that takes a long time to load. For that reason, I want the bottom pane to be a panel with a progress bar until the image is ready.
Here's a simple version of my code:
JPanel progressBarPanel = new JPanel();
JProgressBar progressBar = new JProgressBar(0, 1);
progressBar.setIndeterminate(true);
progressBarPanel.add(progressBar);
splitPane.setBottomComponent(progressBarPanel); // line A
splitPane.invalidate();
JPanel imagePanel = createImagePanelSlowly(); // line B
splitPane.setBottomComponent(imagePanel);
splitPane.invalidate();However, this doesn't work; the display isn't updated until the image is ready. What do I need to put in between lines A and B so that the progress bar shows up before line B starts executing? I've tried validate(), repaint(), using threads and setting the size of the frame to zero and back again, but none of those seem to work. If I pop up a dialog after I add the progress bar to the split pane, the progress bar shows up as soon as the dialog shows up.
This code is inside a ListSelectionListener on a table elsewhere on the GUI, in case that's relevant.
I think I don't understand some basic principle about how to get the GUI to be updated immediately after I make some change.

As suggested, I have prepared a compilable demonstration. I figured out that the
problem I was having before was that I was trying to join the background and
event-processing threads (I had been using threads, but I didn't show that code in the
version I posted since it didn't seem to matter). After I eliminated the join, the progress
bar is displayed, but the user can do other things while the image is loading. I want to
prevent the user from doing that. I switched the cursor to a wait cursor, but that doesn't
seem to prevent it.
In particular, while it is loading, the user should be able to:
* resize the window
* minimize the window and bring it back up
* ideally, adjust the split pane, but that isn't critical
but NOT:
* select a different row in the table
* sort the table
* use the menus
Any attempt by the user to perform the disallowed actions should have no effect either
while the image is loading or after it has finished.
(That is, the disallowed events should not simply be queued for later.)
I wonder if there is a simple way to accomplish that.
Here is a demo (3 classes):
import java.awt.Color;
import java.awt.Component;
import java.awt.Cursor;
import java.awt.Font;
import java.awt.GraphicsEnvironment;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.Enumeration;
import java.util.Vector;
import javax.swing.Box;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.border.EtchedBorder;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
* Copyright (C) 2006
* All rights reserved.
public class DisableGUIDemo extends JFrame {
 static final Rectangle SCREEN_SIZE = GraphicsEnvironment.getLocalGraphicsEnvironment().getMaximumWindowBounds();
 static final Color HYACINTH = new Color(160, 96, 192);
 static final Color LAVENDER = new Color(224, 208, 232);
 Vector<Vector<String>> demoTableData = new Vector<Vector<String>>();
 Vector<String> demoColumnNames = new Vector<String>();
 protected JTable dataTable;
 protected JScrollPane tablePane;
 protected JSplitPane mainPane;
 protected JPanel imageArea;
 private DefaultTableModel dataModel;
 * This creates a new <code>DisableGUIDemo</code> instance, builds the UI
 * components and displays them.
 private DisableGUIDemo(){
 super();
 setTitle("Demo");
 // Ugly: Initialize the table with demo data.
 Vector<String> demoTableFirstRow = new Vector<String>();
 demoTableFirstRow.add("18");
 demoTableFirstRow.add("13");
 demoTableFirstRow.add("11");
 demoTableFirstRow.add("19");
 demoTableFirstRow.add("19");
 demoTableData.add(demoTableFirstRow);
 Vector<String> demoTableSecondRow = new Vector<String>();
 demoTableSecondRow.add("5");
 demoTableSecondRow.add("3");
 demoTableSecondRow.add("4");
 demoTableSecondRow.add("1");
 demoTableSecondRow.add("3");
 demoTableData.add(demoTableSecondRow);
 Vector<String> demoTableThirdRow = new Vector<String>();
 demoTableThirdRow.add("11");
 demoTableThirdRow.add("12");
 demoTableThirdRow.add("10");
 demoTableThirdRow.add("18");
 demoTableThirdRow.add("18");
 demoTableData.add(demoTableThirdRow);
 demoColumnNames.add("Column 0");
 demoColumnNames.add("Column 1");
 demoColumnNames.add("Column 2");
 demoColumnNames.add("Column 3");
 demoColumnNames.add("Column 4");
 dataModel = new DefaultTableModel(demoTableData, demoColumnNames);
 initialize();
 * The <code>initialize</code> method builds and displays up the GUI.
 private void initialize() {
 addWindowListener(new WindowAdapter() {
 public void windowClosing(WindowEvent e) {
 System.exit(0);
 // Build the GUI panels.
 setJMenuBar(menuBar());
 createSplitPane(true);
 setLocation(SCREEN_SIZE.x, SCREEN_SIZE.y);
 setSize(SCREEN_SIZE.width, SCREEN_SIZE.height - 20);
 setVisible(true);
 * This creates and returns the menu bar. The actions to take in response to menu-option selections are
 * specified here.
 * @return the menu bar
 private JMenuBar menuBar(){
 JMenuBar menuBar = new JMenuBar();
 JMenu fileMenu = new JMenu("File");
 fileMenu.setFont(fileMenu.getFont().deriveFont(10.0f));
 JMenuItem reset = new JMenuItem("Reset");
 reset.setFont(reset.getFont().deriveFont(10.0f));
 reset.addActionListener(new ActionListener(){
 // When the user resets the display, the configuration panel is recreated.
 public void actionPerformed(ActionEvent e){
 dataModel = new DefaultTableModel(demoTableData, demoColumnNames);
 createSplitPane(true);
 int oldWidth = getWidth();
 int oldHeight = getHeight();
 setSize(0, 0);
 setSize(oldWidth, oldHeight);
 repaint();
 JOptionPane.showMessageDialog(DisableGUIDemo.this,
 "The display should be reset.",
 "Reset",
 JOptionPane.PLAIN_MESSAGE);
 fileMenu.add(reset);
 fileMenu.addSeparator();
 JMenuItem saveTable = new JMenuItem("Save Table");
 saveTable.setFont(saveTable.getFont().deriveFont(10.0f));
 saveTable.setEnabled(false);
 fileMenu.add(saveTable);
 menuBar.add(fileMenu);
 menuBar.add(Box.createHorizontalGlue());
 JMenu helpMenu = new JMenu("Help");
 helpMenu.setFont(helpMenu.getFont().deriveFont(10.0f));
 JMenuItem help = new JMenuItem("Documentation");
 help.setFont(help.getFont().deriveFont(10.0f));
 help.addActionListener(new ActionListener(){
 public void actionPerformed(ActionEvent e){
 JOptionPane.showMessageDialog(DisableGUIDemo.this, "There is no documentation available for the demo.");
 helpMenu.add(help);
 menuBar.add(helpMenu);
 return menuBar;
 * The <code>createSplitPane</code> method creates the table and image area and displays them in a split pane.
 * @param createNewTable whether to create a new table (should be false if the table has already been created)
 private void createSplitPane(boolean createNewTable){
 if (createNewTable){
 dataTable = dataTable();
 tablePane = new JScrollPane(dataTable);
 Border etchedBorder = new EtchedBorder(EtchedBorder.RAISED, LAVENDER, HYACINTH);
 tablePane.setBorder(etchedBorder);
 int tablePaneWidth = tablePane.getPreferredSize().width;
 int selectedRow = dataTable.getSelectedRow();
 imageArea
 = (selectedRow == -1)
 ? new JPanel()
 : imageArea((String) dataTable.getValueAt(selectedRow, 0),
 (String) dataTable.getValueAt(selectedRow, 2));
 imageArea.setMinimumSize(imageArea.getPreferredSize());
 mainPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT, tablePane, imageArea);
 getContentPane().removeAll();
 getContentPane().add(mainPane);
 * The <code>dataTable</code> method returns the data table.
 * @return the data table
 private JTable dataTable(){
 JTable table = new JTable(dataModel);
 table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
 ListSelectionModel rowSM = table.getSelectionModel();
 rowSM.addListSelectionListener(new ListSelectionListener() {
 public void valueChanged(ListSelectionEvent e) {
 if (e.getValueIsAdjusting()){
 return; // Ignore extra events.
 ListSelectionModel lsm =
 (ListSelectionModel) e.getSource();
 if (! lsm.isSelectionEmpty()){
 final int selectedRow = dataTable.getSelectedRow();
 setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
 JPanel progressBarPanel = new JPanel(); // This should have a border layout.
 JProgressBar progressBar = new JProgressBar(0, 1);
 progressBar.setIndeterminate(true);
 progressBarPanel.add(progressBar);
 mainPane.setBottomComponent(progressBarPanel);
 mainPane.invalidate();
 mainPane.validate();
 Thread backgroundThread = new Thread(){
 public void run(){
 JPanel imageDisplay = imageArea((String) dataTable.getValueAt(selectedRow, 0),
 (String) dataTable.getValueAt(selectedRow, 2));
 mainPane.setBottomComponent(imageDisplay);
 mainPane.invalidate();
 setCursor(null);
 backgroundThread.start();
 // The following code, before being commented out, caused the GUI to be unresponsive while the image was
 // being loaded. However, without it, the user can do other things while the image is loading, which is
 // not desired.
// try{
// backgroundThread.join();
// catch (InterruptedException ie){
// // N/A
 if (dataModel != null){
 table.sizeColumnsToFit(-1);
 table.getTableHeader().setReorderingAllowed(false);
 SpecialHeaderRenderer headerRenderer = new SpecialHeaderRenderer(this);
 SpecialCellRenderer bodyCellRenderer = new SpecialCellRenderer();
 int i = 0;
 for (Enumeration<TableColumn> columns = table.getColumnModel().getColumns(); columns.hasMoreElements(); /** */){
 int columnWidth = 0;
 TableColumn nextColumn = columns.nextElement();
 nextColumn.setHeaderRenderer(headerRenderer);
 nextColumn.setCellRenderer(bodyCellRenderer);
 nextColumn.sizeWidthToFit();
 Component comp = headerRenderer.getTableCellRendererComponent(table, nextColumn.getHeaderValue(),
 false, false, 0, 0);
 columnWidth = comp.getPreferredSize().width;
 for (int j = 0; j < dataModel.getRowCount(); j++){
 comp = table.getCellRenderer(j, i).getTableCellRendererComponent(table, dataModel.getValueAt(j, i),
 false, false, j, i);
 columnWidth = Math.max(comp.getPreferredSize().width, columnWidth);
 nextColumn.setPreferredWidth(columnWidth);
 nextColumn.setMinWidth(columnWidth);
 i++;
 return table;
 * The <code>imageArea</code> method returns a panel in which an image is shown in the real application.
 * In the demo application, it is replaced by a text label; an artificial delay is used to simulate the
 * delay that would occur during image loading. The image is loaded when the user selects a row in the table.
 * @param parameter1 a parameter to image creation
 * @param parameter2 a parameter to image creation
 * @return a panel in which a text label stands in for an image
 private JPanel imageArea(String parameter1, String parameter2){
 try{
 Thread.sleep(3000);
 catch (InterruptedException ie){
 // N/A
 JPanel imagePanel = new JPanel();
 JLabel substituteLabel = new JLabel("Image for " + parameter1 + ", " + parameter2);
 imagePanel.add(substituteLabel);
 return imagePanel;
 * @param args
 public static void main (String[] args) {
 UIManager.put("Table.font", new Font("DialogInput", Font.PLAIN, 10));
 UIManager.put("Label.font", new Font("Dialog", Font.BOLD, 10));
 UIManager.put("TextField.font", new Font("DialogInput", Font.PLAIN, 10));
 UIManager.put("ComboBox.font", new Font("Dialog", Font.BOLD, 10));
 UIManager.put("Button.font", new Font("Dialog", Font.BOLD, 10));
 UIManager.put("List.font", new Font("Dialog", Font.BOLD, 10));
 try {
 new DisableGUIDemo();
 catch (Throwable e) {
 e.printStackTrace();
 System.exit(0);
 } // end of main ()
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.Comparator;
import java.util.TreeSet;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
import javax.swing.border.EmptyBorder;
import javax.swing.table.TableCellRenderer;
* Copyright (C) 2006
* All rights reserved.
public class SpecialHeaderRenderer extends JPanel implements TableCellRenderer {
 static final Color MAUVE = new Color(192, 160, 208);
 static final Insets ZERO_INSETS = new Insets(0, 0, 0, 0);
 static final EmptyBorder EMPTY_BORDER = new EmptyBorder(ZERO_INSETS);
 private GridBagConstraints constraints = new GridBagConstraints();
 final TreeSet<MouseEvent> processedEvents = new TreeSet<MouseEvent>(new Comparator<MouseEvent>(){
 public int compare(MouseEvent o1, MouseEvent o2){
 return o1.hashCode() - o2.hashCode();
 final private JFrame owner;
public SpecialHeaderRenderer(JFrame ownerWindow) {
 setOpaque(true);
 setForeground(Color.BLACK);
 setBackground(MAUVE);
 setBorder(UIManager.getBorder("TableHeader.cellBorder"));
 setLayout(new GridBagLayout());
 constraints.fill = GridBagConstraints.NONE;
 constraints.gridx = 0;
 setAlignmentY(Component.CENTER_ALIGNMENT);
 owner = ownerWindow;
public Component getTableCellRendererComponent(final JTable table, Object value, boolean isSelected,
 boolean hasFocus, int row, final int column){
 if (table != null){
 removeAll();
 String valueString = (value == null) ? "" : value.toString();
 JLabel title = new JLabel(valueString);
 title.setHorizontalAlignment(SwingConstants.CENTER);
 title.setFont(title.getFont().deriveFont(12.0f));
 constraints.gridy = 0;
 constraints.insets = ZERO_INSETS;
 add(title, constraints);
 final JPanel buttonPanel = new JPanel();
 buttonPanel.setLayout(new GridLayout(1, 2));
 buttonPanel.setAlignmentX(Component.CENTER_ALIGNMENT);
 buttonPanel.setBackground(MAUVE);
 final JButton sortAscendingButton = new JButton("V");
 sortAscendingButton.setMargin(ZERO_INSETS);
 sortAscendingButton.setBorder(EMPTY_BORDER);
 constraints.gridy = 1;
 constraints.insets = new Insets(5, 0, 0, 0);
 buttonPanel.add(sortAscendingButton);
 final JButton sortDescendingButton = new JButton("^");
 sortDescendingButton.setMargin(ZERO_INSETS);
 sortDescendingButton.setBorder(EMPTY_BORDER);
 buttonPanel.add(sortDescendingButton);
 add(buttonPanel, constraints);
 table.getTableHeader().addMouseListener(new MouseAdapter(){
 public void mouseClicked(MouseEvent e) {
 Rectangle panelBounds = table.getTableHeader().getHeaderRect(column);
 Rectangle buttonPanelBounds = buttonPanel.getBounds();
 Rectangle buttonBounds = sortAscendingButton.getBounds();
 buttonBounds.translate(buttonPanelBounds.x, buttonPanelBounds.y);
 buttonBounds.translate(panelBounds.x, panelBounds.y);
 if (buttonBounds.contains(e.getX(), e.getY()) && processedEvents.add(e)){
 // The click was on this button and has not yet been processed.
 JOptionPane.showMessageDialog(owner,
 "The table would be sorted in ascending order of column " + column + ".",
 "Sorted Ascending",
 JOptionPane.PLAIN_MESSAGE);
 table.invalidate();
 table.revalidate();
 table.repaint();
 buttonBounds = sortDescendingButton.getBounds();
 buttonBounds.translate(buttonPanelBounds.x, buttonPanelBounds.y);
 buttonBounds.translate(panelBounds.x, panelBounds.y);
 if (buttonBounds.contains(e.getX(), e.getY()) && processedEvents.add(e)){
 // The click was on this button and has not yet been processed.
 JOptionPane.showMessageDialog(owner,
 "The table would be sorted in descending order of column " + column + ".",
 "Sorted Descending",
 JOptionPane.PLAIN_MESSAGE);
 table.invalidate();
 table.revalidate();
 table.repaint();
 return this;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.GridLayout;
import java.util.HashMap;
import javax.swing.BorderFactory;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.border.EmptyBorder;
import javax.swing.border.LineBorder;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
* <code>SpecialCellRenderer</code> is the custom renderer for all
* rows except the header row.
* Copyright (C) 2006
* All rights reserved.
public class SpecialCellRenderer extends JPanel implements TableCellRenderer {
 protected Color backgroundColor = Color.PINK; // This means the rows for the first row will be white.
 protected HashMap<Object, Color> rowColors = new HashMap<Object, Color>();
public SpecialCellRenderer(){
 setOpaque(true);
 setForeground(Color.BLACK);
 setBackground(Color.WHITE);
 setFont(new Font("Monospaced", Font.PLAIN, 10));
 setAlignmentX(Component.RIGHT_ALIGNMENT);
 setBorder(new EmptyBorder(0, 2, 0, 2));
public Component getTableCellRendererComponent(final JTable table, Object value, boolean isSelected,
 boolean hasFocus, final int row, final int column){
 String columnName = table.getColumnName(column);
 JLabel text = new JLabel();
 text.setOpaque(true);
 if (table != null){
 DefaultTableModel model = (DefaultTableModel) table.getModel();
 if (model == null){
 System.out.println("The model is null!!");
 System.exit(1);
 if (table.isCellSelected(row, column)){
 setBorder(BorderFactory.createMatteBorder((column < 2) ? 0 : 1,
 (column == 2) ? 1 : 0,
 (column < 2) ? 0 : 1,
 (column == table.getColumnCount() - 1) ? 1 : 0,
 Color.BLUE));
 else{
 setBorder(BorderFactory.createEmptyBorder());
 final String rowIdentifier = (String) model.getValueAt(row, 0);
 if (! rowColors.containsKey(rowIdentifier)){
 rowColors.put(rowIdentifier, nextBackgroundColor());
 text.setBackground(rowColors.get(rowIdentifier));
 text.setFont(getFont().deriveFont(Font.PLAIN));
 String valueString = (value == null) ? "" : value.toString();
 text.setText(valueString);
 try{
 Double.parseDouble(valueString);
 text.setHorizontalAlignment(SwingConstants.TRAILING);
 catch (NumberFormatException nfe){
 text.setHorizontalAlignment(SwingConstants.LEADING);
 setLayout(new GridLayout(1, 1));
 removeAll();
 add(text);
 setBackground(text.getBackground());
 if (table.getRowHeight() < getMinimumSize().height){
 table.setRowHeight(getMinimumSize().height);
 return this;
 protected Color nextBackgroundColor(){
 backgroundColor = backgroundColor.equals(Color.WHITE) ? Color.PINK : Color.WHITE;
 return backgroundColor;
}

SizeWidthToFit()

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