Hi Friend,

Try the following code:

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class CheckBoxForm extends JApplet {
JTextArea t = new JTextArea(6, 15);
private JCheckBox cb1 = new JCheckBox("Check Box 1");
private JCheckBox cb2 = new JCheckBox("Check Box 2");
private JCheckBox cb3 = new JCheckBox("Check Box 3");
private JCheckBox cb4 = new JCheckBox("Check Box 4");
private JButton button=new JButton("Submit");
public void init() {
cb1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
trace("1", cb1);
}
});
cb2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
trace("2", cb2);
}
});
cb3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
trace("3", cb3);
}
});
cb4.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
trace("3", cb4);
}
});
Container cp = getContentPane();
cp.setLayout(new FlowLayout());
cp.add(cb1);
cp.add(cb2);
cp.add(cb3);
cp.add(cb4);
cp.add(button);
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JFrame f=new JFrame();
f.add(new JScrollPane(t));
f.setVisible(true);
f.setSize(300,150);
}
});
}

private void trace(String b, JCheckBox cb) {
if (cb.isSelected())
t.append("Checkbox " + b + " is Selected\n");
}

public static void main(String[] args) {
run(new CheckBoxForm(), 150, 200);
}

public static void run(JApplet applet, int width, int height) {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(applet);
frame.setSize(width, height);
applet.init();
applet.start();
frame.setVisible(true);
}
}

Hope that it will be helpful for you.
Thanks