JCheckBox in JTable..urgent!!!

hello all, can you please help me on how to add JCheckBox on each row of JTable?..the value of JCheckBox is not true or false..i just use it for user options.. please help!!

Are you trying to create a checkbox in each row or just a few? Let me know.
Yinka...

Similar Messages

How do I add a JCheckBox to a JTable - URGENT HELP NEEDED

Hello All,
This is kicking my butt. I need to create a JTable that I can dynamically add and delete rows of data to and this table must contain a JCheckBox which I can read the value of. I've been able to find examples out there that provides the ability to have a JCheckBox in the JTable, but do not also provide the function to add / delete rows from the JTable. I need to have both funtions in my table. Can somebody out there please help me with this?
Here's a simple example that I'm working with as a test to figure this out. This example has the functionality to add rows of data.
Thanks in advance.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.JFrame;
import javax.swing.JTable;
import javax.swing.table.*;
public class TableTest extends JFrame implements ActionListener
     JButton btnAdd;
     BorderLayout layout;
     DefaultTableModel model;
     public static void main(String[] args)
          TableTest app = new TableTest();
          app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     public TableTest()
          super("Table Example");
          layout = new BorderLayout();
          Container container = getContentPane();
          container.setLayout(layout);
          btnAdd = new JButton("Add");
          btnAdd.addActionListener(this);
          model = new DefaultTableModel();
          JTable table = new JTable(model);
          // Create a couple of columns
          model.addColumn("Col1");
          model.addColumn("Col2");
          // Append a row
          model.addRow(new Object[] { "v1", "v2" });
          model.addRow(new Object[] { "v3", "v4" });
          JScrollPane scrollPane = new JScrollPane(table);
          container.add(btnAdd, BorderLayout.NORTH);
          container.add(scrollPane,BorderLayout.CENTER);
          setSize(300, 200);
          setVisible(true);
     public void actionPerformed(ActionEvent e)
          if (e.getSource() == btnAdd)
               model.addRow(new Object[]{"Test", new Boolean(true)});
}

I got it, I added the public Class getColumnClass to new DefaultTableModel(). Here it is for your viewing pleasure.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.JFrame;
import javax.swing.JTable;
import javax.swing.table.*;
public class TableTest extends JFrame implements ActionListener
     JButton btnAdd;
     BorderLayout layout;
     DefaultTableModel model;
     JTable table;
     public static void main(String[] args)
          TableTest app = new TableTest();
          app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     public TableTest()
          super("Table Example");
          layout = new BorderLayout();
          Container container = getContentPane();
          container.setLayout(layout);
          btnAdd = new JButton("Add");
          btnAdd.addActionListener(this);
          model = new DefaultTableModel()
               public Class getColumnClass(int col)
                    switch (col)
                         case 1 :
                              return Boolean.class;
                         default :
                              return Object.class;
          table = new JTable(model);
          // Create a couple of columns
          model.addColumn("Col1");
          model.addColumn("Col2");
          // Append a row
          model.addRow(new Object[] { "v1", new Boolean(false)});
          model.addRow(new Object[] { "v3", new Boolean(false)});
          JScrollPane scrollPane = new JScrollPane(table);
          container.add(btnAdd, BorderLayout.NORTH);
          container.add(scrollPane, BorderLayout.CENTER);
          setSize(300, 200);
          setVisible(true);
     public void actionPerformed(ActionEvent e)
          if (e.getSource() == btnAdd)
               model.addRow(new Object[] { "Karl", new Boolean(true)});

(URGENT) jCheckBox in jTable

I have a jTable inwhich I would like to have a column of jCheckBox.
I can I do that ???

class MyTableModel extends AbstractTableModel
   //These are the object Types of the columns represented by this TableModel
    static final Class[] COLUMN_TYPES = new Class[]{
        String.class, Boolean.class, Integer.class, etc...};
    //without getColumnClass() only Strings are displayed
    //this method is what displays the Boolean class as a checkBox etc.
    public Class getColumnClass(int column)
        return COLUMN_TYPES[column];
}

Can not show the JCheckBox in JTable cell

I want to place a JCheckBox in one JTable cell, i do as below:
i want the column "d" be a check box which indicates "true" or "false".
String[] columnNames = {"a","b","c","d"};
Object[][] rowData = {{"", "", "", Boolean.FALSE}};
tableModel = new DefaultTableModel(rowData, columnNames);
dataTable = new JTable(tableModel);
dataTable.getColumnModel().getColumn(3).setCellEditor(new DefaultCellEditor(new JCheckBox()));
But when i run it, the "d" column show the string "false" or "true", not the check box i wanted.
I do not understand it, can you help me?
Thank you very much!
coral9527

Do not use DefaultTableModel, create your own table model and you should implement the method
getColumnClass to display the boolean as checkbox ...
I hope the following colde snippet helps you :
class MyModel extends AbstractTableModel {
          private String[] columnNames = {"c1",
"c2"};
public Object[][] data ={{Boolean.valueOf(true),"c1d1"}};
     public int getColumnCount() {
     //System.out.println("Calling getColumnCount");
     return columnNames.length;
public int getRowCount() {
//System.out.println("Calling row count");
return data.length;
public String getColumnName(int col) {
return columnNames[col];
public Object getValueAt(int row, int col) {
return data[row][col];
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
* Don't need to implement this method unless your table's
* editable.
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
return 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);

Booleans not rendering as JCheckBoxes in JTable

I've read several posts on trying to get JCheckBoxes to render in a JTable, and I've looked at the Tables tutorial, but I still can't figure out why my JTable isn't rendering Booleans as check-boxes. :-(
I thought rendering check-boxes was the the default behavior for cells with Boolean values. This doesn't seem to be the case. I can add a cell editor of type JCheckBox by simply instantiating a new DefaultCellEditor, but adding a cell renderer doesn't look so easy (I believe I have to create my own implementation class). I was trying to avoid that, because a) I'm working in Servoy (which means I'm working in a Rhino editor and need to access my own custom classes as plugins or beans), and b) my Java skills are weak.
So can anybody see anything about my code that is obviously wrong? Or do I have to roll up my sleeves and write my own DefaultTableCellRenderer bean/plugin?
Here's my code (remember - it's javascript instances of java objects). (Note: I'm not sure exactly what kinds of objects JSDataSet.getAsTableModel() returns to the JTable model, but creating my own JTable with a vector of vectors of Boolean objects, or setting a Boolean in the cell after the fact doesn't work either.)
Any tips would be greatly appreciated.
// convert dataset into JTable
var table = elements.monitoring;
table.model = treatments.getAsTableModel();
// modify column headers
var columns = table.columnModel;
columns.getColumn(0).setHeaderValue('Quantity');
columns.getColumn(0).setPreferredWidth(60);
columns.getColumn(1).setHeaderValue('Repeats/hr.');
columns.getColumn(1).setPreferredWidth(75);
columns.getColumn(2).setHeaderValue('TREATMENT');
columns.getColumn(2).setPreferredWidth(225);
// start treatment times at 8am
var j=8;
for (i=3;i<44;++i) {
     var j_int = Packages.java.lang.Integer(j);
     columns.getColumn(i).setHeaderValue(j_int);
     columns.getColumn(i).setPreferredWidth(10);
     if (j == 12) {
          j=0;
     ++j;
// center cell data
var cell_class = Packages.java.lang.String;
var table_renderer = table.getDefaultRenderer(cell_class);
table_renderer.setHorizontalAlignment(0);
// add JTable to JScrollPane viewport (necessary to display headers)
var viewport = elements.monitoring_pane.viewport;
viewport.add(table);

Ok, another problem -
I wound up throwing out the Rhino constructor method and implementing my own JTable class and importing it into the Rhino scope. I had to do that because I needed columns to render different types of objects - basically, the table cells should appear blank until they are selected and data is added to them, at which point they should be Boolean and render check-boxes - I got that to work by overriding the getCellRenderer method.
The problem is, I need to add some logic to the 'onClick' event for the table cell, so that I can add a blank check box, add a checked check box, or remove a check box. I looked at the Table tutorial and tried to do it by implementing the TableModelListener interface on my JTable and defining the tableChanged method. However, when I add the tableChanged method to my class, I get an ArrayIndexOutOfBoundsException.
Any tips would be greatly appreciated.
I instantiate the class in Rhino and add the TableModelListener like so:
var table = new Packages.my_classes.MyJTable();
table.model = model; // a working model defined elsewhere
table.getModel().addTableModelListener(table);Here's my class:
package my_classes;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.*;
public class MyJTable extends JTable implements TableModelListener {
     public TableCellRenderer getCellRenderer(int row, int column) {
          Object value = getValueAt(row,column);
          if (value == null) {
               return getDefaultRenderer(JCheckBox.class);
          return super.getCellRenderer(row,column);
     public Class getColumnClass(int column) {
          if (column > 2) {
               return Boolean.class;
          } else {
               return Object.class;
     public void tableChanged(TableModelEvent e) {
          int row = e.getFirstRow();
          int column = e.getColumn();
          TableModel model = (TableModel) e.getSource();
          String columnName = model.getColumnName(column);
          Object data = model.getValueAt(row, column);
}

Double clicking for editing JCheckBox in JTable under java 1.6?

Hi all,
I have a JTable with JCheckboxes in a column (and associated renderer and editor). All worked good with/until java 1.5.
Now with java 1.6 I have to click two times on the checkbox in order to change the selection...
Anyone has experimented a similar problem??

I have spent some hours over this strange problem finding no way to solve it and no workaround.
Could this be a bug introduced with java 1.6?
Note that the behaviour is more strange as what I hade described in my last post:
- mouse click on a cell with a checkbox: checkbox CHANGE state
- mouse click on other celll with checkbox: NO EFFECT
- click on other celll: checkbox CHANGE state
- click on other celll: NO EFFECT
- click on other celll: checkbox CHANGE state
- click on other celll: NO EFFECT
- click on other celll: checkbox CHANGE state
- click on other celll: NO EFFECT
- ... and so on
Really strange, at least for me...

How to insert jcheckbox in jtable

hello
i am user of oracle9i jdeveloper using jclient/swing .
question:
how to insert jcheckbox at a particular cell in jtable.
please reply to me if anyone amongst you know the solution.
thank you

Please continue the discussion here: how to insert checkbox at a particular cell in jtable
Correct me if this is not about the same subject.

JComboBox in Jtable - Urgent!!!!

Hi folks,
I am using my owm editor for combobox in jtable. My problem is when I am editing the combobox, value is set only after I press enter or click on the other row. But I want to set the values when i change the selection in the combobox. How can I do that. It is very URGENT!! I appreciate any help.
My code for editor :
class comboEditor extends DefaultCellEditor
public comboEditor (JComboBox b)
super(new JComboBox()); //Unfortunately, the constructor
//expects a check box, combo box,
//or text field.
editorComponent = b;
setClickCountToStart(1); //This is usually 1 or 2.
//Must do this so that editing stops when appropriate.
b.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
fireEditingStopped();
b.addItemListener(new ItemListener()
public void itemStateChanged(ItemEvent e)
fireEditingStopped();
protected void fireEditingStopped()
super.fireEditingStopped();
public Object getCellEditorValue()
return editorComponent;
public Component getTableCellEditorComponent(JTable table,
Object value,
boolean isSelected,
int row,
int column)
editorComponent = (JComboBox)value;
return editorComponent;
Thank you very much.

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).
And one more problem is samething is happening for even textfield in the table. So, how can I fire editing stopped event before setting the new data. Actually, now when I directly set the data , it is setting the data first and then firing editing stopped event, so it is setting the data for second selected panel.
Any help is appreciated.
Thanks.

Adding JcheckBox in JTable

Hi there,
I have a JcheckBox in a JTable. Whenever I click the Checkbox , on that particular cell it display true , when Clicked and false when I click again. Is there any way that I could disable that ?, I also wanted to center the Jcheckbox ?
Thanks

Similar way I'm using in other class & it is working.But a JTable is not the same as other components, which is why you should be using Boolean values.
You responded to my post 12 minutes after I posted my reply. That did not give you enough time to read the tutorial and understand how to use a JTable correctly!!!

Adding JCheckBox into JTable

Hi all,
I added a JCheckBox into a JTable, while clicking the check box the selection will not replicate into the JTable. Please help me to resolve this issue.
* TableDemo.java
* Created on September 5, 2006, 11:49 AM
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
package simPackage;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.DefaultCellEditor;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.*;
* @author aathirai
public class TableDemo extends JPanel{
   // public JRadioButton[] dataButton;
    /** Creates a new instance of TableDemo */
    public TableDemo() {
        JCheckBox firstCheck = new JCheckBox("");
        Object[][] data={{firstCheck,"2","4","5","2"}};
                String[] columnNames={"qr No","supplier kt code","part no","start date","end date"};
                JTable searchResultTable = new JTable(data,columnNames);
                searchResultTable.getColumn("qr No").setCellRenderer(new RadioButtonRenderer());
                searchResultTable.getColumn("qr No").setCellEditor(new RadioButtonEditor(firstCheck));
        JScrollPane scrollPane = new JScrollPane(searchResultTable);
        //Add the scroll pane to this panel.
        add(scrollPane);
public static void main(String args[])   {
     JFrame jFrame = new JFrame("testing");
     jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        //Create and set up the content pane.
        TableDemo newContentPane = new TableDemo();
        newContentPane.setOpaque(true); //content panes must be opaque
        jFrame.setContentPane(newContentPane);
        //Display the window.
        jFrame.pack();
        jFrame.setVisible(true);
class RadioButtonRenderer implements TableCellRenderer {
    public JCheckBox check1 = new JCheckBox("");
public Component getTableCellRendererComponent(JTable table, Object value,
   boolean isSelected, boolean hasFocus, int row, int column) {
      check1.setBackground(Color.WHITE);
     return check1;
class RadioButtonEditor extends DefaultCellEditor{
    public JCheckBox check1 = new JCheckBox("");
boolean state;
int r, c;
JTable t;
class RbListener implements ActionListener{
    public void actionPerformed(ActionEvent e){
      if (e.getSource() == check1){
        state = true;
      else{
        state = false;
      RadioButtonEditor.this.fireEditingStopped();
public RadioButtonEditor(JCheckBox checkBox) {
    super(checkBox);
public Component getTableCellEditorComponent(JTable table, Object value,
   boolean isSelected, int row, int column) {
    RbListener rb = new RbListener();
    t = table;
    r = row;
    c = column;
    if (value == null){
      return null;
    check1.addActionListener(rb);
     //check1.setSelected(((Boolean)value).booleanValue());
    /*if (((Boolean)value).booleanValue() == true){
      check1.setSelected(true);
    return check1;
public Object getCellEditorValue() {
    if (check1.isSelected() == true){
      return Boolean.valueOf(true);
    else{
      return Boolean.valueOf(false);
}Thanks in advance.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
class TableDemo extends JPanel
public TableDemo()
    //JCheckBox firstCheck = new JCheckBox("");
    //Object[][] data={{firstCheck,"2","4","5","2"}};
    Object[][] data={{new Boolean(false),"2","4","5","2"}};
    String[] columnNames={"qr No","supplier kt code","part no","start date","end date"};
    JTable searchResultTable = new JTable(data,columnNames);
    //searchResultTable.getColumn("qr No").setCellRenderer(new RadioButtonRenderer());
    //searchResultTable.getColumn("qr No").setCellEditor(new RadioButtonEditor(firstCheck));
    TableColumn tc = searchResultTable.getColumnModel().getColumn(0);
    tc.setCellEditor(searchResultTable.getDefaultEditor(Boolean.class));
    tc.setCellRenderer(searchResultTable.getDefaultRenderer(Boolean.class));
    JScrollPane scrollPane = new JScrollPane(searchResultTable);
    add(scrollPane);
public static void main(String args[])
    JFrame jFrame = new JFrame("testing");
    jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    TableDemo newContentPane = new TableDemo();
    newContentPane.setOpaque(true); //content panes must be opaque
    jFrame.setContentPane(newContentPane);
    jFrame.pack();
    jFrame.setVisible(true);
}

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)

Click on JCheckBox in JTable gets me a NullPointerException

Hi everyone,
The subject says almost everything : I have a JTable with one colum with check boxes and another one with combo boxes. When I select a check box the value of the combo box of the same line is updated but for some reason I get the following exception :
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
     at javax.swing.plaf.basic.BasicTableUI$Handler.setValueIsAdjusting(BasicTableUI.java:923)
     at javax.swing.plaf.basic.BasicTableUI$Handler.mouseReleased(BasicTableUI.java:1136)
     at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:273)
     at java.awt.Component.processMouseEvent(Component.java:6263)
     at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
     at java.awt.Component.processEvent(Component.java:6028)
     at java.awt.Container.processEvent(Container.java:2041)
     at java.awt.Component.dispatchEventImpl(Component.java:4630)
     at java.awt.Container.dispatchEventImpl(Container.java:2099)
     at java.awt.Component.dispatchEvent(Component.java:4460)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
     at java.awt.Container.dispatchEventImpl(Container.java:2085)
     at java.awt.Window.dispatchEventImpl(Window.java:2478)
     at java.awt.Component.dispatchEvent(Component.java:4460)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
The updating of the combo box column is done as following :
          final int row = evt.getLastRow();
          if ( (Boolean) this.table.getValueAt(row, CHECKBOX_COL) ) {
               final Object o = // some non-null object
               this.table.setValueAt(o, row, COMBOBOX_COL);
          this.table.repaint(0);
The object o is one of the items stored by the combo box so no inconsistency on that side.
Any help welcome !
Julien

I can't provide a SSCCE because of the numerous non-free libraries I'm using.
Anyway, here's what I found out so far :
As the StackTrace tells us the method that throws the exception is setValueIsAdjusting
        private void setValueIsAdjusting(boolean flag) {
            table.getSelectionModel().setValueIsAdjusting(flag);
            table.getColumnModel().getSelectionModel().
                    setValueIsAdjusting(flag);
        }Here table is null, which obviously throws the exception. It has been set to null by calling the BasicTableUI.uninstallUI method.
So my questions are :
Why would the uninstallUI method be called before the other calls ?
Is there a way to controll the calls to this method ?
Is there a way to get the setValueIsAdjusting method to be called before ?
regards
Julien

Need help in jtable - urgent....

is it possible to put a progress bar on the table. if so please give a sample source code. thankssss

It�s possible, but it isn�t so easy to put an JComponent in a table cell. You have to rewrite the TableModel, the TableCellRenderer and perhaps the TableCellEditor! Please descripe exactly what actions you want to do. Perhaps I can help!
Greetings <tg>

Boolean Fields as JCheckbox in a Dynamic JTable

Hi,
I am building an application like an sql query browser. I want to show boolean fields as JCheckbox in JTable. But the problem is that the table is dynamic, i don't know which column is boolean. How can i handle this? Should i configure getValueAt() overrided method in my TableModel class? If yes, how? Or any other suggestion . . .
Regards.

As default, boolean fields are shown as jcheckbox in jtable if getValueAt() method in my TableModel returns Object (not by getting string value). I am not careful nowadays :)

Checking Unchecking of JCheckBox value inside JTable cell

My problem is that i have jtable which has table data. In that first column has jcheckbox values which are there because of the tabledata has firstcolumn values as boolean, to know the no of checks in jcheckboxes in jtable, there is count variable which needs to be dynamic. When i first check the box the variable that i have set to know the check i.e count increases by one, then next jcheckbox if i check then count goes to 2, but real problem is when i do some 2 events on same checkbox then ie. if i check the jcheckbox , the count increases but after that the jcheckbox doesnot listen to events fired. Any help is appreciated

The example from above shows how to add Objects to a table. If you want a column of checkBoxes then simply replace the Objects in one of the columns with:
new Boolean(false)
Read the Swing tutorial on [url http://java.sun.com/docs/books/tutorial/uiswing/components/table.html]How to Use Tables for more information.

JCheckBox in JTable..urgent!!!

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