Program not working properly.

Question

Hello all,
The code below display a button and 3 option (radio) buttons. The program must uncheck the selected radio button when the button is clicked. Actually nothing happens in this code, that is the selected radio button has no change. Can anyone give a helping hand.
regards,
==================
import java.awt.*;
import java.awt.event.*;
public class CheckGroupDemo extends Frame {
     private CheckboxGroup cg;
     private Checkbox[] cb;
     private String[] cbLbl = { "Red", "Blue" ,"Green" };
     private Button cancel;
     public CheckGroupDemo () {
          super("Checkbox Group Demo");
          Panel p = new Panel();
          cg = new CheckboxGroup();
          p.setLayout(new GridLayout(3,1));
          cb = new Checkbox[cbLbl.length];
          for (int i=0; i<cbLbl.length; i++) {
               cb[i] = new Checkbox(cbLbl,cg,false);
               p.add(cb[i]);
          cancel = new Button("Clear All");
          cancel.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e) {
                    for (int i=0; i<cbLbl.length; i++) {
                         if (cb[i].is)
                         cb[i].setCheckboxGroup(cg);
                         cb[i].setState(false);
          setLayout(new BorderLayout());
          add(cancel,"North");
          add(p,"Center");
          pack();
     public static void main(String[] a) {
          CheckGroupDemo app = new CheckGroupDemo();
          app.setVisible(true);
          app.addWindowListener(new WindowAdapter () {
               public void windowClosing(WindowEvent e) {
                    System.exit(0);

Answer 1

Hello, I have tried using JRadioButton objects,but when i click on the Cancel button the selected JRadioButton does not get deselected. please tell me what is wrong in my code?
regards,
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
public class CheckGroupDemo extends JFrame {
     private ButtonGroup cg;
     private JRadioButton[] rb;
     private String[] cbLbl = { "Red", "Blue" ,"Green" };
     private JButton cancel;
     private JPanel p;
     public CheckGroupDemo () {
          super("Checkbox Group Demo");
          p = new JPanel();
          cg = new ButtonGroup();
          p.setLayout(new GridLayout(3,1));
          rb = new JRadioButton[cbLbl.length];
          for (int i=0; i<cbLbl.length; i++) {
               rb[i] = new JRadioButton(cbLbl,false);
               cg.add(rb[i]);
               p.add(rb[i]);
          cancel = new JButton("Clear All");
          cancel.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e) {
                    for (int i=0; i<cbLbl.length; i++) {
                         if (rb[i].isSelected())                          
                              rb[i].setSelected(false);
                              rb[i].repaint();
          setLayout(new BorderLayout());
          add(cancel,"North");
          add(p,"Center");
          pack();
     public static void main(String[] a) {
          CheckGroupDemo app = new CheckGroupDemo();
          app.setVisible(true);
          app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);