JTable Urgent !

In JTable if the focus is not removed from the row, which is edited last and if some other action is performed(like sending the data to database) then the data from the last cell which is being edited is not saved.
This problem is solved in jdk 1.3 by calling fireTableCellUpdated() method of DefaultTableModel. But in jdk 1.4.1 this does not work. Can anyone help me for this.

Sorry, it is not working and I also get this error message when I click the cell. Do you know why I got the cursor indicator inside the cell after I registered a FocusLost event?
thanks
kelly
Exception occurred during event dispatching:
java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
     at java.awt.Component.getLocationOnScreen_NoTreeLock(Component.java:1242)
     at java.awt.Component.getLocationOnScreen(Component.java:1216)
     at javax.swing.Autoscroller.mouseDragged(Autoscroller.java:82)
     at javax.swing.JComponent.processMouseMotionEvent(JComponent.java:2295)
     at java.awt.Component.processEvent(Component.java:3548)
     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 javax.swing.plaf.basic.BasicTableUI$MouseInputHandler.repostEvent(BasicTableUI.java:438)
     at javax.swing.plaf.basic.BasicTableUI$MouseInputHandler.mouseDragged(BasicTableUI.java:503)
     at java.awt.AWTEventMulticaster.mouseDragged(AWTEventMulticaster.java:260)
     at java.awt.Component.processMouseMotionEvent(Component.java:3759)
     at javax.swing.JComponent.processMouseMotionEvent(JComponent.java:2299)
     at java.awt.Component.processEvent(Component.java:3548)
     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:2205)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2125)
     at java.awt.Container.dispatchEventImpl(Container.java:1200)
     at java.awt.Window.dispatchEventImpl(Window.java:926)
     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)

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Thanks Greg. But my problem is when I select an item in the combobox still that column contains combobox in the table which I don't want. I want the combobox to be dissappear as soon as I select an item. This is important for me as I can change the values in the table dynamically by selecting the different panels underneath the dialog which contains this table. So, if user selects an item in the combobox ( without clicking the enter key)and then selects another panel (which loads different data ), then the selected value is set for the second panel not for the first panel(actually value shud be set for first panel).
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Hello All,
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import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.JFrame;
import javax.swing.JTable;
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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();
}

How do i add data from database to JTable ! Urgent

How do i add data from database to the columns of JTable?.

hi,
Thanks for ur link. but this is just a part of my application which i am developing user interface in swing package for which i want to know how to show data to user in the table format where by table input data will be from the database. say something like todays activity is shown to the user in table format... So u have any idea of how to do this...

Urgent help needed in jtable

PLEASE could someone help me look at this and see why the color of my data in a jtable cell is niot turning red when I press enter
THX
package mintest;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.text.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.table.*;
import com.borland.jbcl.layout.*;
import java.awt.color.*;
import javax.swing.event.*;
import java.awt.Image;
import javax.swing.ImageIcon;
import javax.swing.AbstractButton;
import javax.swing.JButton;
import java.awt.datatransfer.*;
import javax.swing.BorderFactory;
import javax.swing.border.Border;
import javax.swing.border.TitledBorder;
import javax.swing.border.EtchedBorder;
import java.io.*;
import java.awt.print.*;
import javax.print.*;
import javax.print.attribute.*;
import javax.print.attribute.standard.*;
import javax.swing.BorderFactory;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.border.Border;
import javax.swing.table.TableCellRenderer;
import java.awt.Color;
import java.awt.Component;
import javax.swing.table.DefaultTableCellRenderer;
public class VeckoSchema extends JPanel
private boolean DEBUG = false;
JTabbedPane tabbedPane;
Color rgdcolor2= new Color (0,153,255); //Definiera f?rgen f?r schema-,projekt- och l?nehuvudflikarna
Color rgdcolor1= new Color (0,102,255);
Color rgdcolor3= new Color (51,204,255); //Definiera f?rgen f?r schema-,projekt- och l?nehuvudflikarna
Color rgdcolor= new Color (0,0,153);
Color rgdcolor4= new Color (153,153,153);
JList list;
DefaultListModel listModel = new DefaultListModel();
ImageIcon icon= new ImageIcon ("D:\\Dokument\\Skolarbete\\Examens projekt\\JAVA\\minTest\\Bakgrundsbild2.jpg");
ImageIcon icon1= new ImageIcon ("D:\\Dokument\\Skolarbete\\Examens projekt\\JAVA\\minTest\\Save16.gif");
ImageIcon icon2= new ImageIcon ("D:\\Dokument\\Skolarbete\\Examens projekt\\JAVA\\minTest\\printer2.gif");
JButton spara;
JButton Ok_knapp = new JButton();
JPanel panel7;
TitledBorder title;
Border blackline;
JTable table = new JTable(new MyTableModel());
int x;int y;
Object data1;
//ColorRenderer renderer;
Color mincellColor= Color.red;
TableCellRenderer Renderer;
public VeckoSchema() {
try {
jbInit();
catch(Exception e) {
e.printStackTrace();
private void jbInit() throws Exception
this.setBackground(rgdcolor2);
this.setLayout(null);
//Skapa tabellen
//JTable table = new JTable(new MyTableModel());
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
JScrollPane scrollPane = new JScrollPane(table);
scrollPane.setBounds(30, 40, 1000, 600);//(avst?nd fr?n v?nster sidan 49, avst?nd fr?n norr 39, bredd 144, h?jd 38));
this.add(scrollPane);
//TableCellRenderer weirdRenderer = new WeirdRenderer();
table.setCellSelectionEnabled(true);
table.requestFocus(true);
table.getInputMap().put(KeyStroke.getKeyStroke(
KeyEvent.VK_ENTER, 0),
"check");
table.getActionMap().put("check", new AbstractAction() {
public void actionPerformed(ActionEvent e) {
try {
System.out.println("BINGO");
x= table.getSelectedColumn() ;
y= table.getSelectedRow() ;
//System.out.println("markerad kolumn ?r" + table.getSelectedColumn()) ;
//System.out.println("markerad Rad ?r" + table.getSelectedRow()) ;
// table.setColumnSelectionAllowed(true);
data1 = table.getModel().getValueAt(
table.getSelectedRow(),
table.getColumnModel().getColumn(
table.getSelectedColumn()).getModelIndex());
System.out.println("markerad text inneh?ller" + data1);
x= table.getSelectedColumn() ;
y= table.getSelectedRow() ;
/* table.setDefaultRenderer(Object.class, new DefaultTableCellRenderer() {
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column)
System.out.println("hejsan hoppsan markerad text inneh?ller" + data1);
Component cell =super.getTableCellRendererComponent(table, value, isSelected,hasFocus, row, column);
if (row == y && column == x ) {
System.out.println("rad"+y);
System.out.println("column"+x);*/
//cell.setFont(new java.awt.Font("Dialog", 0, 20));
/* cell.setForeground(Color.red);
else
cell.setForeground(null);
return cell;
// ColorRenderer centerRenderer = new ColorRenderer();
// Use renderer on a specific column
/* TableColumn column = table.getColumnModel().getColumn(
table.getColumnModel().getColumn(
table.getSelectedColumn()).getModelIndex()
column.setCellRenderer( centerRenderer );
table.setDefaultRenderer(String.class, centerRenderer);*/
class table extends JTable {
ColorRenderer multiRenderer=new ColorRenderer();
table(MyTableModel tm)
super(tm);
public TableCellRenderer getCellRenderer(int row,int col) {
if (row == y && col == x) return multiRenderer;
else return super.getCellRenderer(row,col);
catch(Exception x) {
x.printStackTrace();
class MyTableModel extends AbstractTableModel {
String[] columnNames = {"",
"M?NDAG",
"TISDAG",
"ONSDAG",
"TORSDAG",
"FREDAG",
"L?RDAG",
"S?NDAG"};
Object[][] data = {
{"Anna Svensson","", "","Eji Eze", "","","",""},
{"","", "","", "Christopher ?kesson","Eji Eze","",""},
{"","", "","", "","Sara Eggert","",""},
{"Eji Eze","", "","", "","","",""},
{"Stefan Wielsel","", "","", "","","",""},
{"","", "","", "","","Anna Persson","Markus Nilsson"},
{"","Markus Nilsson", "Malin Mejby","", "","","",""},
{"","Stefan Wiesel", "","", "","","",""},
{"","Anna Svensson", "","", "","","",""},
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];
/* Denna metod g?r det m?jligt att ?ndrar i tabellen*/
public boolean isCellEditable(int row, int col) {
if (col < 8) {
return false;
} else {
return true;
/*Denna metod g?r s? ?ndringarna som g?rs i en viss cell inte f?rsvinnar d? man l?mnar cellen*/
Object[][] value = {              {"Chiji Eze"},
int row= 3;
int col = 4;
public void setValueAt(Object value, int row, int col) {
/* if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value
+ " (an instance of "
+ value.getClass() + ")");
data[row][col] = value;
fireTableCellUpdated(row, col);
/* if (DEBUG) {
System.out.println("New value of data:");
printDebugData();
/* private void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount();
for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + data[i][j]);
System.out.println();
System.out.println("--------------------------");*/
/*class MyCellColor extends DefaultTableCellRenderer
public MyCellColor()
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column)
JLabel result = null;
if(isSelected && value != null)
result = new JLabel(value.toString());
result.setOpaque(true);
result.setForeground(Color.blue);
System.out.println("Result "+result.getText());
System.out.println("Color is "+result.getForeground());
return result;
/* public TableCellRenderer getCellRenderer (int row, int column)
//seulement pour la premiere colonne
if (column == 0)
return Renderer;
// sinon le Renderer par d?faut
return super.getCellRenderer (row, column);
class ColorRenderer extends JTextArea implements TableCellRenderer{ //DefaultTableCellRenderer
Color testfarg;
public ColorRenderer( ){
testfarg= Color.red;
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
System.out.println("hejsan hoppsan markerad text inneh?ller" + data1);
//Component cell =super.getTableCellRendererComponent(table, value, isSelected,hasFocus, row, column);
if(row==y && column == x)
setForeground(testfarg);
else
setBackground(null);
return this;

You really need to study this tutorial:
http://java.sun.com/docs/books/tutorial/uiswing/components/table.html
After you have read it, take a look at this example, and tweak it to suit your needs:
import javax.swing.table.*;
import javax.swing.*;
public class Test {
public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.getContentPane().add(new JScrollPane(new JTable(new MyTableModel())));
    frame.pack();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setVisible(true);
class MyTableModel extends AbstractTableModel {
private String columnNames[] = new String[] {
      "Name", "Checked"
private Class columnClasses[] = new Class[] {
      String.class, Boolean.class
private Object data[][] = new Object[][] {
      { "One", Boolean.TRUE },
      { "Two", Boolean.FALSE },
      { "Three", Boolean.FALSE },
      { "Four", Boolean.TRUE },
public int getColumnCount() {
    return columnNames.length;
public int getRowCount() {
    return data.length;
public Object getValueAt(int rowIndex, int columnIndex) {
    return data[rowIndex][columnIndex];
public Class getColumnClass(int columnIndex) {
    return columnClasses[columnIndex];
public String getColumnName(int columnIndex) {
    return columnNames[columnIndex];
public boolean isCellEditable(int rowIndex, int columnIndex) {
    if (columnIndex == 1)
      return true;
    else
      return false;
public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
    data[rowIndex][columnIndex] = aValue;
}

Urgent help needed in Checkbox in JTable

I am trying to put a checkbox in the JTable. The value from the database is a string . The column name is checked. I want if hte value in the database is "yes" the column should be checked and if it is "no" it should not be checked or vice versa( if i check it, in database it should update the value as yes).
I have the following code, it does not work. I try to click and it does not get clicked, Do you have anys suggestions P;ease help.
if (checked == null)
TableColumn column = table.getColumn("Checked");
checked = new JCheckBox();
// column.setCellRenderer(new CheckedBox());
column.setCellEditor(new DefaultCellEditor(checked));
checked.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent event)
isChecked = checked.isSelected();
class CheckedBox extends JCheckBox implements TableCellRenderer
public CheckedBox()
setHorizontalAlignment(JRadioButton.CENTER);
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column)
setEnabled(((Boolean)value).booleanValue());
return this;

You really need to study this tutorial:
http://java.sun.com/docs/books/tutorial/uiswing/components/table.html
After you have read it, take a look at this example, and tweak it to suit your needs:
import javax.swing.table.*;
import javax.swing.*;
public class Test {
public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.getContentPane().add(new JScrollPane(new JTable(new MyTableModel())));
    frame.pack();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setVisible(true);
class MyTableModel extends AbstractTableModel {
private String columnNames[] = new String[] {
      "Name", "Checked"
private Class columnClasses[] = new Class[] {
      String.class, Boolean.class
private Object data[][] = new Object[][] {
      { "One", Boolean.TRUE },
      { "Two", Boolean.FALSE },
      { "Three", Boolean.FALSE },
      { "Four", Boolean.TRUE },
public int getColumnCount() {
    return columnNames.length;
public int getRowCount() {
    return data.length;
public Object getValueAt(int rowIndex, int columnIndex) {
    return data[rowIndex][columnIndex];
public Class getColumnClass(int columnIndex) {
    return columnClasses[columnIndex];
public String getColumnName(int columnIndex) {
    return columnNames[columnIndex];
public boolean isCellEditable(int rowIndex, int columnIndex) {
    if (columnIndex == 1)
      return true;
    else
      return false;
public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
    data[rowIndex][columnIndex] = aValue;
}

Urgent:display result from JTable

need help making the following in my code work:
1.how do i display the whole table in my code using a dialog box or JOptionPane.
2. i want to display a message beneath the table show the total price of items selected from the JComboBox .
3.is there any way i could add a method or sommething that display detail of each item seleted from the list in a seperate column of the JTable in my code.say for instance,if i selects beans,1 cup, 100 and it display protein in a seperate column in the JTable.
Thanks in advance.
my code:
'\n'
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.table.*;
import java.util.*;
public class BreakFast extends JFrame implements ActionListener{
     private JList ingredient;
     private JTable table;
     private DefaultTableModel model;
     private JButton move;
     private String[] food;
     private JComboBox box,box1;
     private String[] units;
     private double[] price={100,150,200,250,300,350,400};
     private JButton finish;
     public BreakFast(){
          Container c=getContentPane();
          c.setLayout(new FlowLayout());
          food = new String[] {"Corn Flakes","Beans","Shredded Bread","Mushroom",
          "eggs","Milks","Butter","Sugar","water","Oil"};
          ingredient = new JList(food);
          ingredient.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
          ingredient.setVisibleRowCount(4);
          JPanel p = new JPanel();
          p.setBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED));
          move = new JButton(">>>");
          move.addActionListener(this);
          //meal = new JTextArea(5,20);
          //meal.setEditable(false);
          p.add(new JScrollPane(ingredient),"Wast");
          JPanel p2 = new JPanel();
          p2.setBorder(new BevelBorder(BevelBorder.RAISED));
          units = new String[]{"2 cups","3 cups","4 cups","5 cups","1 mudu","2 mudu",
                    "3 mudu","4 mudu","5 mudu","6 mudu","7 mudu","8 mudu","9 mudu",
                    "1 bag"};
          box = new JComboBox(units);
          box.addActionListener(this);
          box1 = new JComboBox();
          //box1.setEditable(true);
          box1.addActionListener(this);
          for(int i=0;i<price.length;i++){
               box1.addItem(price);
          model = new DefaultTableModel();
          //model.addColumn("No.");
          model.addColumn("Food Items");
          model.addColumn("Units");
          model.addColumn("Price");
          table = new JTable(model);
          JScrollPane pane = new JScrollPane(table);
          pane.setPreferredSize(new Dimension(350,100));
          finish = new JButton("Finish");
          finish.addActionListener(this);
          p.add(box,"West");
          p.add(box1,"Center");
          p.add(move,"East");
          p2.add(pane,"North");
          p2.add(finish,"South");
          c.add(p);
          c.add(p2);
          setSize(450,300);
          setVisible(true);
          setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     public void actionPerformed(ActionEvent e){
     Object[] value = ingredient.getSelectedValues();
     if(e.getSource() == move){
     for(int i=0;i < value.length;i++){
     String word = (String)value[i];
     Vector<Object> data = new Vector<Object>();
     data.addElement( word );
data.addElement( box.getSelectedItem() );
data.addElement( box1.getSelectedItem());
     model.addRow( data );
     if(e.getSource() == finish){
          JOptionPane.showMessageDialog(BreakFast.this,table,"Selection Summary",JOptionPane.PLAIN_MESSAGE);
          System.exit(0);
     public static void main(String[] arg){
          new BreakFast();

Multi-Post:
http://forum.java.sun.com/thread.jspa?threadID=5122371&tstart=0
Ignored.

JTable Display problem (urgent)

Hi all,
Does anyone here know how to make a all columnns in my table visible
This is my code. It simple bunches up the columns but I need them spaced out.
Thanks all :)
import java.awt.*;
import javax.swing.*;
import java.util.*;
public class TableProblem extends JFrame {
Vector rows, columnHeads;
BorderLayout borderLayout1 = new BorderLayout();
JScrollPane jScrollPane1 = new JScrollPane();
JTable jTable1 = new JTable();
public TableProblem ()
testData(); // used to put data in the vectors for the table
initTable(); // used to instantiate and setup the gui
setSize(1100,600);
show();
public static void main(String[] args) {
TableProblem tprob = new TableProblem();
public void testData ()
int mc = 100;
int mr = 100;
int k = 0;
Vector temp;
columnHeads = new Vector();
for (int i=0; i<mc; i++)
columnHeads.addElement(Integer.toString(i));
rows = new Vector();
for (int i=0; i<mr; i++)
temp = new Vector();
for (int j=0; j<mc; j++)
temp.addElement(Integer.toString(k++));
rows.addElement(temp);
public void initTable()
getContentPane().setLayout(borderLayout1);
jTable1 = new JTable(rows,columnHeads);
jScrollPane1 = JTable.createScrollPaneForTable(jTable1);
getContentPane().add(jScrollPane1, BorderLayout.CENTER);
jScrollPane1.getViewport().add(jTable1,null);
jScrollPane1.getViewport().add(jTable1, null);
jTable1.setMinimumSize(new Dimension(8000,2000));
/****************************************************/

If I understood you correctly, I think this is what you need:
// Prohibit table from resizing itself
jTable1.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
Regards,
Boris

URGENT!!! Help me about JTable, Please.

I have a JTable, it is contained into JScrollPane and I show JScrollPane on a Dialog. When I use JTable, I have some problem :
+ How can I change the data in a JTable, change quantity of columns, quantity of rows (example : I can increase or decrease quantity of columns or rows at the run time).

if you have the JDK documentation installed than search for JTable, you will get everything on tables there, no offence but it sounds really stupid that you cant get what you want coz according to your question, i have seen more than enough information.
asrar

JTable Urgent !

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