TableChanged() problem..

Hi everyone,
I am trying to detect changes to cell data in my JTable. But for some reason, I have implemented the tableChanged() listener and it detects changes in table structure (when columns are added), but when a rows data is simply edited, it does not notify the listener.
My implementation is as follows:
       this.myModel.addTableModelListener(
            new TableModelListener () {
                public void tableChanged(javax.swing.event.TableModelEvent evt) {
                    handleTableChanged(evt);
        myTable.setModel(myModel);

Try with valuechanged() event.

Similar Messages

URGENT HELP NEEDED FOR JTABLE PROBLEM!!!!!!!!!!!!!!!!!

firstly i made a jtable to adds and deletes rows and passes the the data to the table model from some textfields. then i wanted to add a tablemoselistener method in order to change the value in the columns 1,2,3,4 and set the result of them in the column 5. when i added that portion of code the buttons that added and deleted rows had problems to function correctly..they dont work at all..can somebody have a look in my code and see wot is wrong..thanx in advance..
below follows the code..sorry for the mesh of the code..you can use and run the code and notice the problem when you press the add button..also if you want delete the TableChanged method to see that the add button works perfect.
* Created on 03-Aug-2005
* TODO To change the template for this generated file go to
* Window - Preferences - Java - Code Style - Code Templates
* @author Administrator
* TODO To change the template for this generated type comment go to
* Window - Preferences - Java - Code Style - Code Templates
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Vector;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import java.io.*;
public class NodesTable extends JFrame implements TableModelListener, ActionListener {
JTable jt;
DefaultTableColumnModel dtcm;
TableColumn column[] = new TableColumn[100];
DefaultTableModel dtm;
JLabel Name,m1,w1,m2,w2;
JTextField NameTF,m1TF,w1TF,m2TF,w2TF;
String c [] ={ "Name", "Assessment1", "Weight1" , "Assessment2","Weight2 ","TotalMark"};
float x=0,y=0,tMark=0,z = 0;
float j=0;
int i;
     JButton DelButton;
     JButton AddButton;
     JScrollPane scrollPane;
     JPanel mainPanel,buttonPanel;
     JFrame frame;
     Object[][] data =
          {"tami", new Float(1), new Float(1.11), new Float(1.11),new Float(1),new Float(1)},
          {"tami", new Float(1), new Float(2.22), new Float(2.22),new Float(1),new Float(1)},
          {"petros", new Float(1), new Float(3.33), new Float(3.33),new Float(1),new Float(1)},
          {"petros", new Float(1), new Float(4.44), new Float(4.44),new Float(1),new Float(1)}
public NodesTable() {
super("Student Marking Spreadsheet");
this.AddNodesintoTable();
setSize(400,250);
setVisible(true);
public void AddNodesintoTable(){
// Create a vector object and load them with the data
// to be placed on each row of the table
dtm = new DefaultTableModel(data,c);
dtm.addTableModelListener( this );
jt = new JTable(dtm){
     // Returning the Class of each column will allow different
          // renderers to be used based on Class
          public Class getColumnClass(int column)
               return getValueAt(0, column).getClass();
          // The Cost is not editable
          public boolean isCellEditable(int row, int column)
               int modelColumn = convertColumnIndexToModel( column );
               return (modelColumn == 5) ? false : true;
//****************************User Input**************************
//Add another node
//Creating and setting the properties
//of the panel's component (panels and textfields)
Name = new JLabel("Name");
Name.setForeground(Color.black);
m1 = new JLabel("Mark1");
m1.setForeground(Color.black);
w1 = new JLabel("Weigth1");
w1.setForeground(Color.black);
m2= new JLabel("Mark2");
m2.setForeground(Color.black);
w2 = new JLabel("Weight2");
w2.setForeground(Color.black);
NameTF = new JTextField(5);
NameTF.setText("Node");
m1TF = new JTextField(5);
w1TF = new JTextField(5);
m2TF=new JTextField(5);
w2TF=new JTextField(5);
//creating the buttons
JPanel buttonPanel = new JPanel();
AddButton=new JButton("Add Row");
DelButton=new JButton("Delete") ;
buttonPanel.add(AddButton);
buttonPanel.add(DelButton);
//adding the components to the panel
JPanel inputpanel = new JPanel();
inputpanel.add(Name);
inputpanel.add(NameTF);
inputpanel.add(m1);
inputpanel.add(m1TF);
inputpanel.add(w1);
inputpanel.add(w1TF);
inputpanel.add(m2);
inputpanel.add(m2TF);
inputpanel.add(w2TF);
inputpanel.add(w2);
inputpanel.add(AddButton);
inputpanel.add(DelButton);
//creating the panel and setting its properties
JPanel tablepanel = new JPanel();
tablepanel.add(new JScrollPane(jt, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED
, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS));
getContentPane().add(tablepanel, BorderLayout.CENTER);
getContentPane().add(inputpanel, BorderLayout.SOUTH);
//Method to add row for each new entry
public void addRow()
Vector r=new Vector();
r=createBlankElement();
dtm.addRow(r);
jt.addNotify();
public Vector createBlankElement()
Vector t = new Vector();
t.addElement((String) " ");
t.addElement((String) " ");
t.addElement((String) " ");
t.addElement((String) " ");
t.addElement((String) " ");
return t;
// Method to delete a row from the spreadsheet
void deleteRow(int index)
if(index!=-1) //At least one Row in Table
dtm.removeRow(index);
jt.addNotify();
// Method that adds and deletes rows
// from the table by pressing the
//corresponding buttons
public void actionPerformed(ActionEvent ae){
     Float z=new Float (m2TF.getText());
String Name= NameTF.getText();
Float x= new Float(m1TF.getText());
Float y= new Float(w1TF.getText());
Float j=new Float (w2TF.getText());
JFileChooser jfc2 = new JFileChooser();
String newdata[]= {Name,String.valueOf(x),String.valueOf(y),
String.valueOf(z),String.valueOf(j)};
Object source = ae.getSource();
if(ae.getSource() == (JButton)AddButton)
addRow();
if (ae.getSource() ==(JButton) DelButton)
deleteRow(jt.getSelectedRow());
//method to calculate the total mark in the TotalMark column
//that updates the values in every other column
//It takes the values from the column 1,2,3,4
//and changes the value in the column 5
public void tableChanged(TableModelEvent e) {
     System.out.println(e.getSource());
     if (e.getType() == TableModelEvent.UPDATE)
          int row = e.getFirstRow();
          int column = e.getColumn();
          if (column == 1 || column == 2 ||column == 3 ||column == 4)
               TableModel model = jt.getModel();
          float     q= ((Float)model.getValueAt(row,1)).floatValue();
          float     w= ((Float)model.getValueAt(row,2)).floatValue();
          float     t= ((Float)model.getValueAt(row,3)).floatValue();
          float     r= ((Float)model.getValueAt(row,4)).floatValue();
               Float tMark = new Float((q*w+t*r)/(w+r) );
               model.setValueAt(tMark, row, 5);
// Which cells are editable.
// It is only necessary to implement this method
// if the table is editable
public boolean isCellEditable(int row, int col)
{ return true; //All cells are editable
public static void main(String[] args) {
     NodesTable t=new NodesTable();
}

There are too many mistakes in your program. It looks like you are new to java.
Your add and delete row buttons are not working because you haven't registered your action listener with these buttons.
I have modifide your code and now it works fine. Just put some validation code for the textboxes becuase it throws exception when user presses add button without entering anything.
Here is the updated code: Do the diff and u will know my changes
* Created on 03-Aug-2005
* TODO To change the template for this generated file go to
* Window - Preferences - Java - Code Style - Code Templates
* @author Administrator
* TODO To change the template for this generated type comment go to Window -
* Preferences - Java - Code Style - Code Templates
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableColumnModel;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableModel;
public class NodesTable extends JFrame implements TableModelListener,
          ActionListener {
     JTable jt;
     DefaultTableColumnModel dtcm;
     TableColumn column[] = new TableColumn[100];
     DefaultTableModel dtm;
     JLabel Name, m1, w1, m2, w2;
     JTextField NameTF, m1TF, w1TF, m2TF, w2TF;
     String c[] = { "Name", "Assessment1", "Weight1", "Assessment2", "Weight2 ",
               "TotalMark" };
     float x = 0, y = 0, tMark = 0, z = 0;
     float j = 0;
     int i;
     JButton DelButton;
     JButton AddButton;
     JScrollPane scrollPane;
     JPanel mainPanel, buttonPanel;
     JFrame frame;
     public NodesTable() {
          super("Student Marking Spreadsheet");
          this.AddNodesintoTable();
          setSize(400, 250);
          setVisible(true);
     public void AddNodesintoTable() {
          // Create a vector object and load them with the data
          // to be placed on each row of the table
          dtm = new DefaultTableModel(c,0);
          dtm.addTableModelListener(this);
          jt = new JTable(dtm) {
               // The Cost is not editable
               public boolean isCellEditable(int row, int column) {
                    int modelColumn = convertColumnIndexToModel(column);
                    return (modelColumn == 5) ? false : true;
          //****************************User Input**************************
          //Add another node
          //Creating and setting the properties
          //of the panel's component (panels and textfields)
          Name = new JLabel("Name");
          Name.setForeground(Color.black);
          m1 = new JLabel("Mark1");
          m1.setForeground(Color.black);
          w1 = new JLabel("Weigth1");
          w1.setForeground(Color.black);
          m2 = new JLabel("Mark2");
          m2.setForeground(Color.black);
          w2 = new JLabel("Weight2");
          w2.setForeground(Color.black);
          NameTF = new JTextField(5);
          NameTF.setText("Node");
          m1TF = new JTextField(5);
          w1TF = new JTextField(5);
          m2TF = new JTextField(5);
          w2TF = new JTextField(5);
          //creating the buttons
          JPanel buttonPanel = new JPanel();
          AddButton = new JButton("Add Row");
          AddButton.addActionListener(this);
          DelButton = new JButton("Delete");
          DelButton.addActionListener(this);
          buttonPanel.add(AddButton);
          buttonPanel.add(DelButton);
          //adding the components to the panel
          JPanel inputpanel = new JPanel();
          inputpanel.add(Name);
          inputpanel.add(NameTF);
          inputpanel.add(m1);
          inputpanel.add(m1TF);
          inputpanel.add(w1);
          inputpanel.add(w1TF);
          inputpanel.add(m2);
          inputpanel.add(m2TF);
          inputpanel.add(w2TF);
          inputpanel.add(w2);
          inputpanel.add(AddButton);
          inputpanel.add(DelButton);
          //creating the panel and setting its properties
          JPanel tablepanel = new JPanel();
          tablepanel.add(new JScrollPane(jt,
                    JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                    JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS));
          getContentPane().add(tablepanel, BorderLayout.CENTER);
          getContentPane().add(inputpanel, BorderLayout.SOUTH);
     //Method to add row for each new entry
     public void addRow() {
          Float z = new Float(m2TF.getText());
          String Name = NameTF.getText();
          Float x = new Float(m1TF.getText());
          Float y = new Float(w1TF.getText());
          Float j = new Float(w2TF.getText());
          String newdata[] = { Name, String.valueOf(x), String.valueOf(y),
                    String.valueOf(z), String.valueOf(j) };
          dtm.addRow(newdata);
     // Method to delete a row from the spreadsheet
     void deleteRow(int index) {
          if (index != -1) //At least one Row in Table
               dtm.removeRow(index);
               jt.addNotify();
     // Method that adds and deletes rows
     // from the table by pressing the
     //corresponding buttons
     public void actionPerformed(ActionEvent ae) {
          Object source = ae.getSource();
          if (ae.getSource() == (JButton) AddButton) {
               addRow();
          if (ae.getSource() == (JButton) DelButton) {
               deleteRow(jt.getSelectedRow());
     //method to calculate the total mark in the TotalMark column
     //that updates the values in every other column
     //It takes the values from the column 1,2,3,4
     //and changes the value in the column 5
     public void tableChanged(TableModelEvent e) {
          System.out.println(e.getSource());
          //if (e.getType() == TableModelEvent.UPDATE) {
               int row = e.getFirstRow();
               int column = e.getColumn();
               if (column == 1 || column == 2 || column == 3 || column == 4) {
                    TableModel model = jt.getModel();
                    float q = (new Float(model.getValueAt(row, 1).toString())).floatValue();
                    float w = (new Float(model.getValueAt(row, 2).toString())).floatValue();
                    float t = (new Float(model.getValueAt(row, 3).toString())).floatValue();
                    float r = (new Float(model.getValueAt(row, 4).toString())).floatValue();
                    Float tMark = new Float((q * w + t * r) / (w + r));
                    model.setValueAt(tMark, row, 5);
     // Which cells are editable.
     // It is only necessary to implement this method
     // if the table is editable
     public boolean isCellEditable(int row, int col) {
          return true; //All cells are editable
     public static void main(String[] args) {
          NodesTable t = new NodesTable();
}

Is not abstract and does not override abstract method tablechanged

I will remove all the gui code to make it shorter, but my problem lies with my InteractiveTableModelListener.
public class Meet extends JPanel{
private static void createAndShowGUI() {
        JFrame frame = new JFrame("MEET_dataTable");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(new Meet(), BorderLayout.CENTER);
        frame.pack();
        frame.setVisible(true);
public class InteractiveTableModelListener implements TableModelListener {
     public void TableChanged(TableModelEvent evt) {
if (evt.getType() == TableModelEvent.UPDATE) {
      int column = evt.getColumn();
      int row = evt.getFirstRow();
      dataTable.setColumnSelectionInterval(column + 1, column + 1);
      dataTable.setRowSelectionInterval(row, row);
class InteractiveRenderer extends DefaultTableCellRenderer {
protected int interactiveColumn;
public InteractiveRenderer(int interactiveColumn) {
      this.interactiveColumn = interactiveColumn;
public Component getTableCellRendererComponent(JTable dataTable,
     Object value, boolean isSelected, boolean hasFocus, int row,
     int column)
Component c = super.getTableCellRendererComponent(dataTable, value, isSelected, hasFocus, row, column);
   if (column == interactiveColumn && hasFocus) {
     if ((Meet.this.tableModel.getRowCount() - 1) == row &&
        !Meet.this.tableModel.hasEmptyRow())
         Meet.this.tableModel.addEmptyRow();
    highlightLastRow(row);
return c;
public void highlightLastRow(int row) {
     int lastrow = tableModel.getRowCount();
if (row == lastrow - 1) {
      dataTable.setRowSelectionInterval(lastrow - 1, lastrow - 1);
else {
      dataTable.setRowSelectionInterval(row + 1, row + 1);
     dataTable.setColumnSelectionInterval(0, 0);
public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
            UIManager.put("swing.boldMetal", Boolean.FALSE);
            createAndShowGUI();
}As i say, i have removed all the gui code to make it shorter, but in this code i create the table and add all the model to it. I am being returned with the error
Meet.InteractiveTableModelListener is not abstract and does not override abstract method tableChanged(javax.swing.event.TableModelEvent)in javax.swing.event.TableModelListener
what would be causing this error?
Cheers

Sorry, just figured out my silly error, the method is tableChanged not TableChanged.
cheers
TOPIC CLOSED
Edited by: nick2price on Sep 11, 2008 7:08 AM

Problem with addRow and MultiLine Cell renderer

Hi ,
Ive a problem with no solution to me .......
Ive seen in the forum and Ivent found an answer.......
The problem is this:
Ive a JTable with a custom model and I use a custom multiline cell renderer.
(becuse in the real application "way" hasnt static lenght)
When I add the first row all seem to be ok.....
when I try to add more row I obtain :
java.lang.ArrayIndexOutOfBoundsException: 1
at javax.swing.SizeSequence.insertEntries(SizeSequence.java:332)
at javax.swing.JTable.tableRowsInserted(JTable.java:2926)
at javax.swing.JTable.tableChanged(JTable.java:2858)
at javax.swing.table.AbstractTableModel.fireTableChanged(AbstractTableMo
del.java:280)
at javax.swing.table.AbstractTableModel.fireTableRowsInserted(AbstractTa
bleModel.java:215)
at TableDemo$MyTableModel.addRow(TableDemo.java:103)
at TableDemo$2.actionPerformed(TableDemo.java:256)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:17
64)
at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(Abstra
ctButton.java:1817)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel
.java:419)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:257
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonL
istener.java:245)
at java.awt.Component.processMouseEvent(Component.java:5134)
at java.awt.Component.processEvent(Component.java:4931)
at java.awt.Container.processEvent(Container.java:1566)
at java.awt.Component.dispatchEventImpl(Component.java:3639)
at java.awt.Container.dispatchEventImpl(Container.java:1623)
at java.awt.Component.dispatchEvent(Component.java:3480)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3450
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3165)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3095)
at java.awt.Container.dispatchEventImpl(Container.java:1609)
at java.awt.Window.dispatchEventImpl(Window.java:1590)
at java.awt.Component.dispatchEvent(Component.java:3480)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:450)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:197)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)
This seems to be caused by
table.setRowHeight(row,(getPreferredSize().height+2)); (line 164 of my example code)
About the model I think its ok.....but who knows :-(......
Please HELP me in anyway!!!
Example code :
import javax.swing.*;
import javax.swing.table.*;
import java.text.*;
import javax.swing.text.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class TableDemo extends JFrame {
private boolean DEBUG = true;
MyTableModel myModel = new MyTableModel();
MyTable table = new MyTable(myModel);
int i=0;
public TableDemo() {
super("TableDemo");
JButton bottone = new JButton("Aggiungi 1 elemento");
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
//table.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
//Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table);
//Add the scroll pane to this window.
getContentPane().add(bottone,BorderLayout.NORTH);
getContentPane().add(scrollPane, BorderLayout.CENTER);
bottone.addActionListener(Add_Action);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
class MyTable extends JTable {
MultiLineCellRenderer multiRenderer=new MultiLineCellRenderer();
MyTable(TableModel tm)
super(tm);
public TableCellRenderer getCellRenderer(int row,int col) {
 if (col==1) return multiRenderer;
 else return super.getCellRenderer(row,col);
class MyTableModel extends AbstractTableModel {
Vector data=new Vector();
final String[] columnNames = {"Name",
"Way",
"DeadLine (ms)"
public int getColumnCount() { return 3; }
public int getRowCount() { return data.size(); }
public Object getValueAt(int row, int col) {
Vector rowdata=(Vector)data.get(row);
 return rowdata.get(col); }
public String getColumnName(int col) {
return columnNames[col];
public void setValueAt (Object value, int row,int col)
 //setto i dati della modifica
Vector actrow=(Vector)data.get(row);
actrow.set(col,value);
 this.fireTableCellUpdated(row,col);
 public Class getColumnClass(int c)
 return this.getValueAt(0,c).getClass();
 public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
if (col == 1)
return false;
else
return true;
public void addRow (String name,ArrayList path,Double dead) {
 Vector row =new Vector();
 row.add(name);
 row.add(path);
 row.add(dead);
 row.add(name); //!!!Mi tengo questo dato da utilizzare come key per andare a
 //prendere il path nella lista dei paths di Project
 //(needed as key to retrive data if name in col. 1 is changed)
 data.add(row);
 //Inspector.inspect(this);
 System.out.println ("Before firing Adding row...."+this.getRowCount());
 this.fireTableRowsInserted(this.getRowCount(),this.getRowCount());
public void delRow (String namekey)
for (int i=0;i<this.getRowCount();i++)
if (namekey.equals(this.getValueAt(i,3)))
data.remove(i);
this.fireTableRowsDeleted(i,i);
//per uscire dal ciclo
i=this.getRowCount();
public void delAllRows()
int i;
int bound =this.getRowCount();
for (i=0;i<bound;i++)
 {data.remove(0);
 System.out.println ("Deleting .."+data);
this.fireTableRowsDeleted(0,i);
class MultiLineCellRenderer extends JTextArea implements TableCellRenderer {
private Hashtable rowHeights=new Hashtable();
public MultiLineCellRenderer() {
setEditable(false);
setLineWrap(true);
setWrapStyleWord(true);
//this.setBorder(new Border(
public Component getTableCellRendererComponent(JTable table,Object value, boolean isSelected, boolean hasFocus, int row, int column) {
//System.out.println ("Renderer called"+value.getClass());
if (value instanceof ArrayList) {
String way=new String (value.toString());
setText(way);
TableColumn thiscol=table.getColumn("Way");
//System.out.println ("thiscol :"+thiscol.getPreferredWidth());
//setto il size della JTextarea sulle dimensioni della colonna
//per quanto riguarda il widht e su quelle ottenute da screen per l'height
this.setSize(thiscol.getPreferredWidth(),this.getPreferredSize().height);
// set the table's row height, if necessary
//System.out.println ("Valore getPreferred.height"+getPreferredSize().height);
 if (table.getRowHeight(row)!=(this.getPreferredSize().height+2))
 {System.out.println ("Setting Row :"+row);
 System.out.println ("Dimension"+(getPreferredSize().height+2));
 System.out.println ("There are "+table.getRowCount()+"rows in the table ");
 if (row<table.getRowCount())
 table.setRowHeight(row,(getPreferredSize().height+2));
else
setText("");
return this;
/**Custom JTextField Subclass che permette all'utente di immettere solo numeri
class WholeNumberField extends JTextField {
private Toolkit toolkit;
private NumberFormat integerFormatter;
public WholeNumberField(int value, int columns) {
super(columns);
toolkit = Toolkit.getDefaultToolkit();
integerFormatter = NumberFormat.getNumberInstance(Locale.US);
integerFormatter.setParseIntegerOnly(true);
setValue(value);
public int getValue() {
int retVal = 0;
try {
retVal = integerFormatter.parse(getText()).intValue();
} catch (ParseException e) {
// This should never happen because insertString allows
// only properly formatted data to get in the field.
toolkit.beep();
return retVal;
public void setValue(int value) {
setText(integerFormatter.format(value));
protected Document createDefaultModel() {
return new WholeNumberDocument();
protected class WholeNumberDocument extends PlainDocument {
public void insertString(int offs,
String str,
AttributeSet a)
throws BadLocationException {
char[] source = str.toCharArray();
char[] result = new char[source.length];
int j = 0;
for (int i = 0; i < result.length; i++) {
if (Character.isDigit(source))
result[j++] = source[i];
else {
toolkit.beep();
System.err.println("insertString: " + source[i]);
super.insertString(offs, new String(result, 0, j), a);
ActionListener Add_Action = new ActionListener() {
 public void actionPerformed (ActionEvent e)
 System.out.println ("Adding");
 ArrayList way =new ArrayList();
 way.add(new String("Uno"));
 way.add(new String("Due"));
 way.add(new String("Tre"));
 way.add(new String("Quattro"));
 myModel.addRow(new String("Nome"+i++),way,new Double(0));
public static void main(String[] args) {
TableDemo frame = new TableDemo();
frame.pack();
frame.setVisible(true);

In the addRow method, change the line
this.fireTableRowsInserted(this.getRowCount(),this.getRowCount()); to
this.fireTableRowsInserted(data.size() - 1, data.size() - 1);Sai Pullabhotla

Problem with fireTableDataChanged in JTable

Hi everybody,
i have a really frustrating problem with Jtable. I created a class to display the jtable and a class that extends AbstactTableModel to use as its model. I can update my table after a fireTableDataChanged method in the class that extend the AbstractTableModel, but after implementing a ListSelectionListener to the class that displays the jtable, it gives a big bunch of errors in the console of my ide, when i remove it, it went back to normal without any errors.
Anyways, my program still can run without problem and the table still can refresh, just this bunch of errors when i clicked the button that calls the AbstactTableModel to perform a firetabledatachanged
anybody got this problem? how did you guys solve it?
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: -1
at farm.EmployeesTblModel.getValueAt(EmployeesTblModel.java:58)
at farm.EmployeesTblView.rowEditDelete(EmployeesTblView.java:131)
at farm.EmployeesTblView$1.valueChanged(EmployeesTblView.java:106)
at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:167)
at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:147)
at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:194)
at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:388)
at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:398)
at javax.swing.DefaultListSelectionModel.removeSelectionIntervalImpl(DefaultListSelectionModel.java:559)
at javax.swing.DefaultListSelectionModel.clearSelection(DefaultListSelectionModel.java:403)
at javax.swing.JTable.clearSelection(JTable.java:2040)
at javax.swing.JTable.clearSelectionAndLeadAnchor(JTable.java:2048)
at javax.swing.JTable.sortedTableChanged(JTable.java:4098)
at javax.swing.JTable.tableChanged(JTable.java:4346)
at javax.swing.table.AbstractTableModel.fireTableChanged(AbstractTableModel.java:280)
at javax.swing.table.AbstractTableModel.fireTableDataChanged(AbstractTableModel.java:182)
at farm.EmployeesTblModel.updateData(EmployeesTblModel.java:42)
at farm.EmployeesTblView.updateData(EmployeesTblView.java:59)
at farm.EmployeesTbl.delete(EmployeesTbl.java:273)
at farm.FarmView.delEmpBtnActionPerformed(FarmView.java:1823)
at farm.FarmView.access$2200(FarmView.java:32)
at farm.FarmView$18.actionPerformed(FarmView.java:823)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6038)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3260)
at java.awt.Component.processEvent(Component.java:5803)
at java.awt.Container.processEvent(Container.java:2058)
at java.awt.Component.dispatchEventImpl(Component.java:4410)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
at java.awt.Container.dispatchEventImpl(Container.java:2102)
at java.awt.Window.dispatchEventImpl(Window.java:2429)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)

just this bunch of errors when i clicked the button that calls the AbstactTableModel to perform a firetabledatachangedWell, you should never have a button that invokes fireTableDataChanged.
The TableModel should be responsible for invoking those methods.
I suggest you look at the code for the DefaultTableModel for the proper way to write a TableModel. Basically you create methods to update the model. The model in turn fires the events to notify the view to repaint itself.

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

Problem with adding a new row in JTable

Hi,
I've created a JTable using DefaultTableModel with DefaultTableModel(Object[][] obj,Object[] col) constructor.I've written actionListener for a JButton which should add new row to the tablemodel.Now, the listener adds the row to the model.But its throwing an ArrayOutofBoundsException and the added row is not visible unless I click on any column of the table.
Kindly help me to resolve this problem
TIA
Regards
Gopi

Thanks a lot for the reply. Here is the complete code
TableImpl.java
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.table.*;
import java.util.Vector;
public class TableImpl extends JFrame {
DefaultTableModel dataModel; // TableModel Variable
/* Constructor to add table and button to the frame */
TableImpl() {
 getContentPane().setLayout(null);
 setSize(800,600);
 myModel();
 final JTable table = new JTable(dataModel);
 JScrollPane scrollpane = new JScrollPane(table);
 getContentPane().add(scrollpane);
 scrollpane.setBounds(10,10,700,300);
 TableColumn tcCol = table.getColumnModel().getColumn(1);
 /* Adding ComboBox to the CellEditor of Column 2 of table */
 JComboBox jcbComboBox = new JComboBox();
 final ReturnVector vctDBAccess = new ReturnVector();
 jcbComboBox.addItem(vctDBAccess.vctGetOidList().elementAt(0).toString());
 jcbComboBox.addItem(vctDBAccess.vctGetOidList().elementAt(2).toString());
 jcbComboBox.addItem(vctDBAccess.vctGetOidList().elementAt(4).toString());
 tcCol.setCellEditor(new DefaultCellEditor(jcbComboBox));
 /* Adding Listener for Table */
 dataModel.addTableModelListener(new TableModelListener() {
 public void tableChanged(TableModelEvent e) {
 /* Columns Manipulation */
 if(dataModel.getColumnName(e.getColumn()).equals("Second")) {
 int iRow = e.getFirstRow();
 int iColumn = e.getColumn();
 String strColName = dataModel.getColumnName(iColumn);
 String strData = (String)dataModel.getValueAt(iRow,iColumn);
 String strNextColumn = dataModel.getColumnName(iColumn+1);
 dataModel.setValueAt(vctDBAccess.vctGetOidList().elementAt(vctDBAccess.iGetIndex(strData)+1),iRow,iColumn+1);
 /* Adding button to Frame */
 JButton jbInsert = new JButton("Insert");
 /* Adding new row to the Tablemodel -- Probelm is here */
 jbInsert.addActionListener(new ActionListener(){
 public void actionPerformed(ActionEvent e){
 try {
 Object[] nrow = {"what", "ever", "you"};
 dataModel.addRow(nrow);
 }catch(Exception ex) {
 System.out.println("Exception at adding row = " + ex);
getContentPane().add(jbInsert);
jbInsert.setBounds(100,350,100,20);
addWindowListener(new WindowAdapter() {
 public void windowClosing(WindowEvent e) {
 System.exit(0);
 /* Method to initialise new tablemodel */
 public void myModel() {
 Object[][] data = { {new Integer(10),"two","three"},
 {new Integer(5),"two","three"},
 {new Integer(4),"two","three"},
 String[] col = { "First", "Second", "Third"};
 dataModel = new DefaultTableModel(data,col);
public static void main(String arg[]) {
 TableImpl ct = new TableImpl();
 ct.setVisible(true);
/* Class that returns a Vector of String for populating ComboBox entries and
 for getting the index of a particular element of the vector */
class ReturnVector {
 Vector vctOidName=null;
 ReturnVector() {
 this.vctOidName = new Vector();
 vAddOidList();
 public void vAddOidList() {
 String[] dbResult = { "system", "1.3.6.1.2.1.1" ,
 "interface", "1.3.6.1.2.1.2" ,
 "snmp", "1.3.6.1.2.1.3" };
 for(int i=0;i<dbResult.length;i++) {
 System.out.println("Value = " + dbResult);
 vctOidName.addElement(dbResult[i]);
 public Vector vctGetOidList() {
 return vctOidName;
 public int iGetIndex(String strData) {
 System.out.println("Index = " + vctOidName.indexOf(strData));
 return vctOidName.indexOf(strData);

JTable sorting - problem when adding elements (complete code inside)

I�m writing this email with reference to a recent posting here but this time with the code example. (I apologize for the duplicated posting � this time it will be with the code)
Problem: when adding more elements to the JTable (sorted) the exception: ArrayIndexOutOfBoundsException is thrown.
Example: If the elements in the table are 10 and then the user requests for 8 � the table will produce the correct result. However, if the user will ask for 11 items (>10) the exception will be thrown.
The program: The program below (compiles and running). A JTable is constructed with 3 items, when you click the button - the return result should be 4 items - this will generate the error, WHY?
I would highly appreciate your thoughts why this is happening and most importantly � how to fix it.
Thanks a lot
3 files:
(1) TableSorterDemo
(2) Traveler
(3)TableSorter
//TableSorterDemo:
package sorter;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
* TableSorterDemo is like TableDemo, except that it
* inserts a custom model -- a sorter -- between the table
* and its data model. It also has column tool tips.
public class TableSorterDemo implements ActionListener
 private JPanel superPanel;
 private JButton clickMe = new JButton("click me to get diff data");
 private boolean DEBUG = false;
 private DefaultListModel defaultListModel;
 private JTable table;
 public TableSorterDemo()
 superPanel = new JPanel(new BorderLayout());
 defaultListModel = new DefaultListModel();
 init1();
 TableSorter sorter = new TableSorter(new MyTableModel(defaultListModel)); //ADDED THIS
 table = new JTable(sorter); //NEW
 sorter.setTableHeader(table.getTableHeader()); //ADDED THIS
 table.setPreferredScrollableViewportSize(new Dimension(500, 70));
 //Set up tool tips for column headers.
 table.getTableHeader().setToolTipText(
 "Click to specify sorting; Control-Click to specify secondary sorting");
 //Create the scroll pane and add the table to it.
 JScrollPane scrollPane = new JScrollPane(table);
 //Add the scroll pane to this panel.
 superPanel.add("Center", scrollPane);
 superPanel.add("South",clickMe);
 clickMe.addActionListener(this);
 public JPanel getPanel()
 return superPanel;
 public void init1()
 //in real life this will be done from the db
 Traveler a = new Traveler();
 Traveler b = new Traveler();
 Traveler c = new Traveler();
 a.setFirstName("Elvis");
 a.setLastName("Presley");
 a.setSprot("Ping Pong");
 a.setNumYears(3);
 a.setVegetarian(true);
 b.setFirstName("Elton");
 b.setLastName("John");
 b.setSprot("Soccer");
 b.setNumYears(2);
 b.setVegetarian(true);
 c.setFirstName("shaquille");
 c.setLastName("oneil");
 c.setSprot("Golf");
 c.setNumYears(22);
 c.setVegetarian(true);
 defaultListModel.addElement(a);
 defaultListModel.addElement(b);
 defaultListModel.addElement(c);
 public void init2()
 //in real life this will be done from the db
 Traveler d = new Traveler();
 Traveler e = new Traveler();
 Traveler f = new Traveler();
 Traveler g = new Traveler();
 d.setFirstName("John");
 d.setLastName("Smith");
 d.setSprot("Tennis");
 d.setNumYears(32);
 d.setVegetarian(true);
 e.setFirstName("Ron");
 e.setLastName("Cohen");
 e.setSprot("Baseball");
 e.setNumYears(12);
 e.setVegetarian(true);
 f.setFirstName("Donald");
 f.setLastName("Mac Novice");
 f.setSprot("Vallyball");
 f.setNumYears(1);
 f.setVegetarian(true);
 g.setFirstName("Eithan");
 g.setLastName("Superstar");
 g.setSprot("Vallyball");
 g.setNumYears(21);
 g.setVegetarian(true);
 defaultListModel.addElement(d);
 defaultListModel.addElement(e);
 defaultListModel.addElement(f);
 defaultListModel.addElement(g);
 class MyTableModel extends AbstractTableModel
 private DefaultListModel myModel;
 public MyTableModel(DefaultListModel m)
 myModel=m;
 private String[] columnNames = {"First Name",
 "Last Name",
 "Sport",
 "# of Years",
 "Vegetarian"};
 public int getColumnCount()
 return columnNames.length;
 public int getRowCount()
 return myModel.size();
 public String getColumnName(int column)
 return getNames()[column];
 public String[] getNames()
 String[] names = {"First Name", "Last Name", "Sport", "# of Years", "Vegetarian"};
 return names;
 public Object getValueAt(int row, int col)
 return distributeObjectsInTable(row, col, (Traveler) myModel.elementAt(row));
 public Object distributeObjectsInTable(int row, int col, Traveler tr)
 switch(col)
 case 0:
 return tr.getFirstName();
 case 1:
 return tr.getLastName();
 case 2:
 return tr.getSprot();
 case 3:
 return new Integer(tr.getNumYears());
 case 4:
 return new Boolean (tr.isVegetarian());
 default:
 return "Error";
 public Class getColumnClass(int c)
 return getValueAt(0, c).getClass();
 private static void createAndShowGUI()
 //Make sure we have nice window decorations.
 JFrame.setDefaultLookAndFeelDecorated(true);
 //Create and set up the window.
 JFrame frame = new JFrame("TableSorterDemo");
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 //Create and set up the content pane.
 TableSorterDemo newContentPane = new TableSorterDemo();
 newContentPane.getPanel().setOpaque(true); //content panes must be opaque
 frame.setContentPane(newContentPane.getPanel());
 //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();
 public void actionPerformed(ActionEvent ae)
 if (ae.getSource()==clickMe)
 defaultListModel.removeAllElements();
 init2(); //if the size of the model was less than 2 items - the result will be ok.
 //in other words, if you commens the last 2 rows of this method (addElement(f) & g)
 // the result will be fine.
 table.updateUI();
}//(2) Traveler
package sorter;
public class Traveler
 private String firstName;
 private String lastName;
 private String sprot;
 private int numYears;
 private boolean vegetarian;
 public String getFirstName()
 return firstName;
 public String getLastName()
 return lastName;
 public int getNumYears()
 return numYears;
 public String getSprot()
 return sprot;
 public boolean isVegetarian()
 return vegetarian;
 public void setFirstName(String firstName)
 this.firstName = firstName;
 public void setLastName(String lastName)
 this.lastName = lastName;
 public void setNumYears(int numYears)
 this.numYears = numYears;
 public void setSprot(String sprot)
 this.sprot = sprot;
 public void setVegetarian(boolean vegetarian)
 this.vegetarian = vegetarian;
}//(3)TableSorter
package sorter;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.util.List;
import javax.swing.*;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.*;
public class TableSorter extends AbstractTableModel {
 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 columnComparators = new HashMap();
 private List sortingColumns = new ArrayList();
 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, just pass the event along.
 if (!isSorting()) {
 clearSortingState();
 fireTableChanged(e);
 return;
 // If the table structure has changed, cancel the sorting; the
 // sorting columns may have been either moved or deleted from
 // the model.
 if (e.getFirstRow() == TableModelEvent.HEADER_ROW) {
 cancelSorting();
 fireTableChanged(e);
 return;
 // We can map a cell event through to the view without widening
 // when the following conditions apply:
 // a) all the changes are on one row (e.getFirstRow() == e.getLastRow()) and,
 // b) all the changes are in one column (column != TableModelEvent.ALL_COLUMNS) and,
 // c) we are not sorting on that column (getSortingStatus(column) == NOT_SORTED) and,
 // d) a reverse lookup will not trigger a sort (modelToView != null)
 // Note: INSERT and DELETE events fail this test as they have column == ALL_COLUMNS.
 // The last check, for (modelToView != null) is to see if modelToView
 // is already allocated. If we don't do this check; sorting can become
 // a performance bottleneck for applications where cells
 // change rapidly in different parts of the table. If cells
 // change alternately in the sorting column and then outside of
 // it this class can end up re-sorting on alternate cell updates -
 // which can be a performance problem for large tables. The last
 // clause avoids this problem.
 int column = e.getColumn();
 if (e.getFirstRow() == e.getLastRow()
 && column != TableModelEvent.ALL_COLUMNS
 && getSortingStatus(column) == NOT_SORTED
 && modelToView != null) {
 int viewIndex = getModelToView()[e.getFirstRow()];
 fireTableChanged(new TableModelEvent(TableSorter.this,
 viewIndex, viewIndex,
 column, e.getType()));
 return;
 // Something has happened to the data that may have invalidated the row order.
 clearSortingState();
 fireTableDataChanged();
 return;
 private class MouseHandler extends MouseAdapter {
 public void mouseClicked(MouseEvent e) {
 JTableHeader h = (JTableHeader) e.getSource();
 TableColumnModel columnModel = h.getColumnModel();
 int viewColumn = columnModel.getColumnIndexAtX(e.getX());
 int column = columnModel.getColumn(viewColumn).getModelIndex();
 if (column != -1) {
 int status = getSortingStatus(column);
 if (!e.isControlDown()) {
 cancelSorting();
 // Cycle the sorting states through {NOT_SORTED, ASCENDING, DESCENDING} or
 // {NOT_SORTED, DESCENDING, ASCENDING} depending on whether shift is pressed.
 status = status + (e.isShiftDown() ? -1 : 1);
 status = (status + 4) % 3 - 1; // signed mod, returning {-1, 0, 1}
 setSortingStatus(column, status);
 private static class Arrow implements Icon {
 private boolean descending;
 private int size;
 private int priority;
 public Arrow(boolean descending, int size, int priority) {
 this.descending = descending;
 this.size = size;
 this.priority = priority;
 public void paintIcon(Component c, Graphics g, int x, int y) {
 Color color = c == null ? Color.GRAY : c.getBackground();
 // In a compound sort, make each succesive triangle 20%
 // smaller than the previous one.
 int dx = (int)(size/2*Math.pow(0.8, priority));
 int dy = descending ? dx : -dx;
 // Align icon (roughly) with font baseline.
 y = y + 5*size/6 + (descending ? -dy : 0);
 int shift = descending ? 1 : -1;
 g.translate(x, y);
 // Right diagonal.
 g.setColor(color.darker());
 g.drawLine(dx / 2, dy, 0, 0);
 g.drawLine(dx / 2, dy + shift, 0, shift);
 // Left diagonal.
 g.setColor(color.brighter());
 g.drawLine(dx / 2, dy, dx, 0);
 g.drawLine(dx / 2, dy + shift, dx, shift);
 // Horizontal line.
 if (descending) {
 g.setColor(color.darker().darker());
 } else {
 g.setColor(color.brighter().brighter());
 g.drawLine(dx, 0, 0, 0);
 g.setColor(color);
 g.translate(-x, -y);
 public int getIconWidth() {
 return size;
 public int getIconHeight() {
 return size;
 private class SortableHeaderRenderer implements TableCellRenderer {
 private TableCellRenderer tableCellRenderer;
 public SortableHeaderRenderer(TableCellRenderer tableCellRenderer) {
 this.tableCellRenderer = tableCellRenderer;
 public Component getTableCellRendererComponent(JTable table,
 Object value,
 boolean isSelected,
 boolean hasFocus,
 int row,
 int column) {
 Component c = tableCellRenderer.getTableCellRendererComponent(table,
 value, isSelected, hasFocus, row, column);
 if (c instanceof JLabel) {
 JLabel l = (JLabel) c;
 l.setHorizontalTextPosition(JLabel.LEFT);
 int modelColumn = table.convertColumnIndexToModel(column);
 l.setIcon(getHeaderRendererIcon(modelColumn, l.getFont().getSize()));
 return c;
 private static class Directive {
 private int column;
 private int direction;
 public Directive(int column, int direction) {
 this.column = column;
 this.direction = direction;
}

The table listens to the TableModel for changes. Changing the table by adding/removing
rows or columns has no affect on its table model. If you make changes to the table model
the table will be notified by its TableModelListener and change its view. So tell
MyTableModel about the change of data:
public class TableSorterDemo implements ActionListener
 MyTableModel tableModel;
 public TableSorterDemo()
 defaultListModel = new DefaultListModel();
 init1();
 tableModel = new MyTableModel(defaultListModel);
 TableSorter sorter = new TableSorter(tableModel);
 public void actionPerformed(ActionEvent ae)
 if (ae.getSource()==clickMe)
 defaultListModel.removeAllElements();
 init2();
 tableModel.fireTableStructureChanged();
}

Problem with Table Model Listener

I hava a JTable with three columns and dynamic number of rows. The first column has a text. Second column has check box and each third column has three radio buttons. I am using the table model listener to fetch the row and column which the user clicked. here is the code
public void tableChanged(TableModelEvent e)
row = e.getFirstRow();
column = e.getColumn();
TableModel model = (TableModel)e.getSource();
String columnName = model.getColumnName(column);
Object value = model.getValueAt(row, column);
System.err.println("Value: "value.toString()" Row: "row" Column: "+column);
attendanceModel.setHolidays(row, value.toString());
}Here is the problem
{color:#ff0000}Case 1{color}: When I click the first radio button in first row and third column it works and the output of print statement is
*{color:#993300}Value:0 Row:0 Column:2{color}*
{color:#ff0000}Case 2{color}: Next I clicked the first radio button in second row and third column the method is not called nothing is printed
{color:#ff0000}Case 3{color}: Now I clicked the first radio button in third row and thrid column, the method is called and the output of print statement is
{color:#993300}*Value:0 Row:1 Column:2*{color} ; but the actual value of row should be 2*. Here it is showing the row and column of the previously selected item.
But in {color:#ff0000}case 2{color} instead of first radio button if I selected the second radio button the print statement will print the correct value i.e
{color:#993300}*Value:1 Row:1 Column:2*{color}
ie If I select different radio button in each row the print statement shows the correct value. But if in each row the same radio button is selected its not working properly. For first row it prints properly. If same radio button is selected in second row the method is not called. But from next row onwards the row value is showing the previously selected row as in {color:#ff0000}case 3{color}.
But for the checkboxes in column 2 the same is working properly. Each column has only one check box. So when I select the check box in each row the row and column values are getting changed accordingly.
Could some one help please?
Thanks,
Zach.

To get better help sooner, post a [SSCCE (Short, Self Contained, Compilable and Executable, Example Program)|http://mindprod.com/jgloss/sscce.html] that demonstrates the incorrect behaviour.
db

JTable and TableModelEvent: tableChanged(TableModelEvent) called twice

Hi,
This question has already been posted (http://forum.java.sun.com/thread.jsp?forum=257&thread=114517) but wasn't answered at that time so i decided to make another attempt.
How comes that tableChanged(TableModelEvent) is executed twice for each change?
I've tried to see if the two events could be differenciated by retrieving their properties using the avalaible methods: getType(), getColumn(), getLastRow() etc... but they both come with the same properties values... no easy way to "filter" them in tableChanged() so...
Is there a way to only have one of them cast for one change?
Maybe JTable or TableModel methods to override or sthg like this...
This is a blocking problem for the application we're writting. so, any hint or workaround greatly welcome :)
This one was short... if u need further informations, just post a request for them as a reply, i'll be glad to add details :)
regards,
Silvin

I actually just solved that very problem with my code, as I was reading your post.
remove the model.addTableModelListener(...) call from your code. This is implicitly handled by JTable when you specify model as the TableModel for your table. Adding it again causes it to receive the events twice.
Hope that helps!

Problems with dynamic table

When i run the following code I get these exceptions. the exceptions appear when i enter something in the table. And i can't find out wat i'm doing wrong!!Could you please help me out with this problem.
code:
MyTableModel myModel = new MyTableModel();
JTable table = new JTable(myModel);
JScrollPane scrollPane = new JScrollPane(table);
this.getContentPane().add(scrollPane, new XYConstraints(22, 130, 580, 198));
//opmaak van de kolommen optie en commentaar
setUpOptieColumn(table.getColumnModel().getColumn(0));
setUpCommentaarColumn(table.getColumnModel().getColumn(1));
publiic void setUpOptieColumn(TableColumn optieColumn) {...}
public void setUpCommentaarColumn(TableColumn commentaarColumn) {...}
public void setValueAt(String value, int row, int column)
System.out.println("value: " + value);
System.out.println("Row: "+ row);
System.out.println("column: "+ column);
if (column == 0)
System.out.println("value: " + value);
System.out.println("Row: "+ row);
System.out.println("column: "+ column);
code = value;
myModel.data.add(row,new tabelgegevens (code,"",false));
if (column == 1)
System.out.println("value: " + value);
System.out.println("Row: "+ row);
System.out.println("column: "+ column);
myModel.data.add(row,new tabelgegevens (code,value,false) );
table.tableChanged(new javax.swing.event.TableModelEvent(myModel));
- MyTableModel -
class MyTableModel extends DefaultTableModel
protected static int NUM_COLUMNS = 3;
protected static int START_NUM_ROWS = 1;
protected int nextEmptyRow = 0;
public int numRows = 1;
static final public String code = "Code";
static final public String omschrijving = "Omschrijving";
static final public String wissen = "Wissen";
public Vector data = null;
/*final String[] columnNames = {"Code",
"Omschrijving","Wissen","test"};*/
/*Object[][] data = {{" "," ",new Boolean(false)," "}};*/
public MyTableModel()
data = new Vector(0,1);
data.addElement(new tabelgegevens ("","",false));
public int getColumnCount() {
return NUM_COLUMNS;
public int getRowCount() {
return numRows;
public String getColumnName(int column) {
switch (column)
case 0:
return code;
case 1:
return omschrijving;
case 2:
return wissen;
return "";
public Object getValueAt(int row, int column)
try{
tabelgegevens tg = (tabelgegevens) data.elementAt(row);
switch (column)
case 0:
return (Object)tg.code;
case 1:
return (Object)tg.omschrijving;
case 2:
if (tg.wissen)
return (Object)"true";
else
return (Object)"false";
}catch (Exception e)
return "";
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
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;
exceptions:
Exception occurred during event dispatching:
java.lang.ArrayIndexOutOfBoundsException: 0 >= 0
     at java.util.Vector.elementAt(Vector.java:417)
     at javax.swing.table.DefaultTableModel.setValueAt(DefaultTableModel.java:674)
     at javax.swing.JTable.setValueAt(JTable.java:1737)
     at javax.swing.JTable.editingStopped(JTable.java:2992)
     at javax.swing.AbstractCellEditor.fireEditingStopped(AbstractCellEditor.java:112)
     at javax.swing.DefaultCellEditor$EditorDelegate.stopCellEditing(DefaultCellEditor.java:242)
     at javax.swing.DefaultCellEditor.stopCellEditing(DefaultCellEditor.java:176)
     at javax.swing.DefaultCellEditor$EditorDelegate.actionPerformed(DefaultCellEditor.java:251)
     at javax.swing.JComboBox.fireActionEvent(JComboBox.java:870)
     at javax.swing.JComboBox.selectedItemChanged(JComboBox.java:894)
     at javax.swing.JComboBox.contentsChanged(JComboBox.java:950)
     at javax.swing.AbstractListModel.fireContentsChanged(AbstractListModel.java:79)
     at javax.swing.DefaultComboBoxModel.setSelectedItem(DefaultComboBoxModel.java:86)
     at javax.swing.JComboBox.setSelectedItem(JComboBox.java:415)
     at javax.swing.JComboBox.setSelectedIndex(JComboBox.java:455)
     at javax.swing.plaf.basic.BasicComboPopup$ListMouseHandler.mouseReleased(BasicComboPopup.java:582)
     at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:231)
     at java.awt.Component.processMouseEvent(Component.java:3715)
     at java.awt.Component.processEvent(Component.java:3544)
     at java.awt.Container.processEvent(Container.java:1164)
     at java.awt.Component.dispatchEventImpl(Component.java:2593)
     at java.awt.Container.dispatchEventImpl(Container.java:1213)
     at java.awt.Component.dispatchEvent(Component.java:2497)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:2451)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:2216)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2125)
     at java.awt.Container.dispatchEventImpl(Container.java:1200)
     at java.awt.Window.dispatchEventImpl(Window.java:914)
     at java.awt.Component.dispatchEvent(Component.java:2497)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:339)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:131)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:98)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:85)
thx
lanfeust79

I agree that creating a vector with size 0 isn't very useful. I've changed it, but i'm still getting the same exception.
I think the problem is in the 'getValueAt' method, although i can't figure out where it is.
I'm sorry i'm such a pain in the ass but i appriciate a lot your help.

Problem in capturing the edited data while the table is sorted

hi,
i am using the TableSorter class provided by the sun tutorials to add sorting capability for my JTable. i need to print on the screen, the value of the cell whenever it is updated. so i am using TableModelListener and its tableChanged() method for this purpose. if i edit the data without applying the sorting then its printing fine. But if i edit the data with table sorted in a particular order by clicking on the table header then the tableChanged method is not being called. So some problem lies in the table sorter which is preventing the call to the tableChanged method whenver table it is sorted. Below is my implementation of JTable.
TableSorter sorter = new TableSorter(new MyTableModel());
final JTable table = new JTable(sorter);
table.getModel().addTableModelListener(new
TableModelListener()
 public void tableChanged(TableModelEvent e)
 int row = e.getFirstRow();
 int column = e.getColumn();
 System.out.println("Row: "+row+" Coloumn: "+column);
);Hope u understood the problem. plzz help
thanx

hi camickr,
However the row number displayed is always the row of
the TableModel before the data has been sorted. this is the feature i am trying for and couldnt achieve it. i do want to print the row of tablemodel before data is sorted but i am getting 0 and -1 as row and column numbers.
I never saw -1 as a column number.
if you have never seen -1 as column number then just compile and run the code given below. I just added a table model listener to the table model to capture data editing. So if u edit any cell without applying sorting then its row and column number is printed properly but if u sort a particlar column and with sorting on if u edit any cell you will get row No. as 0 and column No. as -1. try running below code and please let me know where the problem exists or post your code which worked without any of the above problems.
I believe the code was updated in Feb of this year,
so make sure you have the most recent version.yes i have the latest version of tablesorter.
below is my source code for table sorting just compile and run it
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.sql.*;
import javax.swing.table.*;
import java.util.*;
class TableSorterDemo extends JFrame
 public TableSorterDemo()
 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 TableSorter sorter=new TableSorter(new MyTableModel());
 JTable table=new JTable(sorter);
 sorter.setTableHeader(table.getTableHeader());
 table.getModel().addTableModelListener(new
TableModelListener()
 public void tableChanged(TableModelEvent e)
 int row = e.getFirstRow();
 int column = e.getColumn();
 System.out.println("Row :"+row+" Column: "+column);
 JScrollPane scrollPane = new JScrollPane(table);
 scrollPane.setBackground(new Color(198,232,189));
 add(scrollPane);
 pack();
 setVisible(true);
 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 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) {
 data[row][col] = value;
 fireTableCellUpdated(row, col);
 // System.out.println("row "+row+"Col "+col+"Val "+value);
 public static void main(String[] args)
 new TableSorterDemo();
 /*Table Sorter Class*/
class TableSorter extends AbstractTableModel {
 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 columnComparators = new HashMap();
 private java.util.List sortingColumns = new ArrayList();
 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, just pass the event along.
 if (!isSorting()) {
 clearSortingState();
 fireTableChanged(e);
 return;
 if (e.getFirstRow() == TableModelEvent.HEADER_ROW) {
 cancelSorting();
 fireTableChanged(e);
 return;
 int column = e.getColumn();
 if (e.getFirstRow() == e.getLastRow()
 && column != TableModelEvent.ALL_COLUMNS
 && getSortingStatus(column) == NOT_SORTED
 && modelToView != null) {
 int viewIndex = getModelToView()[e.getFirstRow()];
 fireTableChanged(new TableModelEvent(TableSorter.this,
 viewIndex, viewIndex,
 column, e.getType()));
 return;
 // Something has happened to the data that may have invalidated the row order.
 clearSortingState();
 fireTableDataChanged();
 return;
 private class MouseHandler extends MouseAdapter {
 public void mouseClicked(MouseEvent e) {
 JTableHeader h = (JTableHeader) e.getSource();
 TableColumnModel columnModel = h.getColumnModel();
 int viewColumn = columnModel.getColumnIndexAtX(e.getX());
 int column = columnModel.getColumn(viewColumn).getModelIndex();
 if (column != -1) {
 int status = getSortingStatus(column);
 if (!e.isControlDown()) {
 cancelSorting();
 // Cycle the sorting states through {NOT_SORTED, ASCENDING, DESCENDING} or
 // {NOT_SORTED, DESCENDING, ASCENDING} depending on whether shift is pressed.
 status = status + (e.isShiftDown() ? -1 : 1);
 status = (status + 4) % 3 - 1; // signed mod, returning {-1, 0, 1}
 setSortingStatus(column, status);
 private static class Arrow implements Icon {
 private boolean descending;
 private int size;
 private int priority;
 public Arrow(boolean descending, int size, int priority) {
 this.descending = descending;
 this.size = size;
 this.priority = priority;
 public void paintIcon(Component c, Graphics g, int x, int y) {
 Color color = c == null ? Color.GRAY : c.getBackground();
 // In a compound sort, make each succesive triangle 20%
 // smaller than the previous one.
 int dx = (int)(size/2*Math.pow(0.8, priority));
 int dy = descending ? dx : -dx;
 // Align icon (roughly) with font baseline.
 y = y + 5*size/6 + (descending ? -dy : 0);
 int shift = descending ? 1 : -1;
 g.translate(x, y);
 // Right diagonal.
 g.setColor(color.darker());
 g.drawLine(dx / 2, dy, 0, 0);
 g.drawLine(dx / 2, dy + shift, 0, shift);
 // Left diagonal.
 g.setColor(color.brighter());
 g.drawLine(dx / 2, dy, dx, 0);
 g.drawLine(dx / 2, dy + shift, dx, shift);
 // Horizontal line.
 if (descending) {
 g.setColor(color.darker().darker());
 } else {
 g.setColor(color.brighter().brighter());
 g.drawLine(dx, 0, 0, 0);
 g.setColor(color);
 g.translate(-x, -y);
 public int getIconWidth() {
 return size;
 public int getIconHeight() {
 return size;
 private class SortableHeaderRenderer implements TableCellRenderer {
 private TableCellRenderer tableCellRenderer;
 public SortableHeaderRenderer(TableCellRenderer tableCellRenderer) {
 this.tableCellRenderer = tableCellRenderer;
 public Component getTableCellRendererComponent(JTable table,
 Object value,
 boolean isSelected,
 boolean hasFocus,
 int row,
 int column) {
 Component c = tableCellRenderer.getTableCellRendererComponent(table,
 value, isSelected, hasFocus, row, column);
 if (c instanceof JLabel) {
 JLabel l = (JLabel) c;
 l.setHorizontalTextPosition(JLabel.LEFT);
 int modelColumn = table.convertColumnIndexToModel(column);
 l.setIcon(getHeaderRendererIcon(modelColumn, l.getFont().getSize()));
 return c;
 private static class Directive {
 private int column;
 private int direction;
 public Directive(int column, int direction) {
 this.column = column;
 this.direction = direction;
}

JTable 's tableChanged() works differently in jdk1.2.2 and jdk1.3

While updating the contents of the jtable I am using the following
table.tableChanged(new TableModelEvent(model));
table.repaint();
In jdk1.2.2, this updates the contents and repaints the table without clearing the row selection
But the same in jdk1.3 updates and repaints the table but clears the row selection.
How can I overcome with problem.
I also tried model.fireTableStructurChanged();
along with this but it works in jdk1.2.2 and not in jdk1.3.
Any suggestion is greatly appreciated.
Thanks

They have fixed a bug. If you are replacing the whole table, then the row selection for the old table doesn't mean anything for the new table. In fact, that row might not even exist any more.

Jtable problem in changing the row selected

hi,
I am displaying the oracle database information in JTable...user can make changes to a row...once he presses either ENTER,UP OR DOWN ARROW...the changes should be updated into the database...if there is some SQL exception,i am displaying JOptionPane to show the exception message ...i need to keep the selected row to be the one with errors...
my problems are:
i have written a function to update the change to the database...
when should i call that...right now i am calling that in tableChanged method... is there any method to dissable the predefined keys and actions? becaz once user makes changes to a row and presses some key like up/down or enter,the control is getting transfered to the next row...
plz give me the solution...
here is part of my code....
I am adding data later....
     model= new DefaultTableModel((Vector)null,columnNames);
     table = new JTable(model)
     public void tableChanged(TableModelEvent e)
          int firstRow = e.getFirstRow();
     if (e.getType()==TableModelEvent.UPDATE &&(firstRow!=TableModelEvent.HEADER_ROW))
          updateChangesToDatabase(row);
/********in my update method i am setting the focus to the same row
if i get exception....like this....
JOptionPane.showMessageDialog (thisPanel,sb,"Error in UPDATING...",JOptionPane.ERROR_MESSAGE);
table.requestFocusInWindow();
table.setRowSelectionInterval(currentRow,currentRow);
     super.tableChanged(e);
          setUpTableData(); // method to add data...to table..
          table.setDragEnabled(false);
          table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
          JScrollPane scrollPane = new JScrollPane(table,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
          add(scrollPane,BorderLayout.CENTER);
// this i am doing to reset keyboard action but not working....
          table.resetKeyboardActions();

ye rammohan,
you can change the data-element of the field or char of the data-element.
if you try to change the name of the field, it deletes.
so what you can do is, keep the field unchanged, add another field of your choice, using ABAP program, move the data from old field to new field, and then you can delete your old field.
thx
rams

TableModelListener Problem

Hi, My application has a JTree and a PropertyInspector which has a JTable.
When a user selects any node in JTree, I refresh the PropertyInspector and displays the property of the selected node. Now I have a problem in TableModelListener.
For example, I select a node, it has 5 properties, so my Table display 5 properties, I edit the 1st one, and selects the second row to edit, It works fine. TableModelListener called and works perfectly.
But when I edit the 1st property and choose another Tree Node, then TableModelListener returns the getFirstRow to -1 and my programs fails there.
My code is as follows:
   class TableListener
       implements TableModelListener {
      private JTable table;
      public TableListener(JTable table) {
      this.table = table;
      public void tableChanged(TableModelEvent e) {
      int firstRow = e.getFirstRow();
      System.out.println("First Row: " + firstRow); // This is -1 when I select another node.
      int lastRow = e.getLastRow();
      System.out.println("Last Row: " + lastRow);
      int editCol = e.getColumn();
      TableModel model = (TableModel) e.getSource();
      if (e.getType() == TableModelEvent.UPDATE) {
         if (editCol == 0) {
            /*Boolean chk = (Boolean)table.getValueAt(editRow, 0);
              if(chk.booleanValue()) {
                 System.out.println("Box is Selected");
              else {
                 System.out.println("Box is Not Selected");
         else {
            try {
            save(dataObject, model.getValueAt(firstRow, PROPERTY_COLUMN).toString(),
                 model.getValueAt(firstRow, VALUE_COLUMN).toString());
            System.out.println("Saving: " + model.getValueAt(firstRow, PROPERTY_COLUMN).toString() + " " +
                         model.getValueAt(firstRow, VALUE_COLUMN).toString());
            } catch (ArrayIndexOutOfBoundsException ex) {
            System.out.println("ArrayIndexOutOfBoundsException");
   }Any help plz.
Thanks

Hi, My application has a JTree and a PropertyInspector which has a JTable.
When a user selects any node in JTree, I refresh the PropertyInspector and displays the property of the selected node. Now I have a problem in TableModelListener.
For example, I select a node, it has 5 properties, so my Table display 5 properties, I edit the 1st one, and selects the second row to edit, It works fine. TableModelListener called and works perfectly.
But when I edit the 1st property and choose another Tree Node, then TableModelListener returns the getFirstRow to -1 and my programs fails there.
My code is as follows:
   class TableListener
       implements TableModelListener {
      private JTable table;
      public TableListener(JTable table) {
      this.table = table;
      public void tableChanged(TableModelEvent e) {
      int firstRow = e.getFirstRow();
      System.out.println("First Row: " + firstRow); // This is -1 when I select another node.
      int lastRow = e.getLastRow();
      System.out.println("Last Row: " + lastRow);
      int editCol = e.getColumn();
      TableModel model = (TableModel) e.getSource();
      if (e.getType() == TableModelEvent.UPDATE) {
         if (editCol == 0) {
            /*Boolean chk = (Boolean)table.getValueAt(editRow, 0);
              if(chk.booleanValue()) {
                 System.out.println("Box is Selected");
              else {
                 System.out.println("Box is Not Selected");
         else {
            try {
            save(dataObject, model.getValueAt(firstRow, PROPERTY_COLUMN).toString(),
                 model.getValueAt(firstRow, VALUE_COLUMN).toString());
            System.out.println("Saving: " + model.getValueAt(firstRow, PROPERTY_COLUMN).toString() + " " +
                         model.getValueAt(firstRow, VALUE_COLUMN).toString());
            } catch (ArrayIndexOutOfBoundsException ex) {
            System.out.println("ArrayIndexOutOfBoundsException");
   }Any help plz.
Thanks

TableChanged() problem..

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