Checkbox in table cell won't uncheck

Question

Hey all,
Can someone help with this please. I am using a table model where the second column is Boolean. The table correctly renders this as a checkbox (I'm not using a custom renderer). The checkbox works ok except that you can't uncheck it. You can change which row is selected, but clicking twice on the same cell has no effect - it just stays checked.
Thanks in advance for any help.

Answer 1

here I am giving one example. Can u check this. In this eg, I gave check box in 3rd column(column no starting from 0).
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;
import javax.swing.table.*;
import java.awt.*;
public class Class1 extends JFrame {
JScrollPane jScrollPane1 = new JScrollPane();
public Class1() {
super();
try {          
     MyTableModel model = new MyTableModel();     JTable editableTable1 = new JTable(model);     
     DefaultTableModel tblmdl = (DefaultTableModel) editableTable1.getModel();
     tblmdl.setRowCount(3);     
     tblmdl.setColumnCount(3);     
               editableTable1.setCellSelectionEnabled(true);
     this.getContentPane().setLayout(null);
               jScrollPane1.setBounds(new Rectangle(25, 19, 330, 180));
     this.getContentPane().add(jScrollPane1, null);
               jScrollPane1.getViewport().add(editableTable1, null);
     addWindowListener(new WindowAdapter() {
     public void windowClosing(WindowEvent we) {
          System.exit(0);
} catch(Exception e) {
     System.out.println("Exception in Class1:"+e);
class MyTableModel extends DefaultTableModel {
     MyTableModel() {
     public Class getColumnClass(int c) {
     if(c == 2) {
     return Boolean.class;
     } else {
     return String.class;
public static void main(String[] args) {
Class1 class1 = new Class1();
class1.setSize(400, 400);
class1.setVisible(true);
}