Check Box in Java

import java.awt.*;
import java.awt.event.*;
class Mycheckbox extends Frame implements ItemListener
{
String msg=" ";
Checkbox c1,c2,c3;
Mycheckbox()
{
setLayout(new FlowLayout());
c1=new Checkbox("Bold",true);
c1=new Checkbox("Bold");
c1=new Checkbox("Underlined");
add(c1);
add(c2);
add(c3);
c1.addItemListener(this);
c2.addItemListener(this);
c3.addItemListener(this);
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent we)
{
System.exit(0);
}
});
}
public void itemStateChanged(ItemEvent ie)
{
repaint();
}
public void paint(Graphics g)
{
g.drawString("Current state:",10,100);
msg="Bold:"+c1.getState();
g.drawString(msg,10,120);
msg="Italic"+c2.getState();
g.drawString(msg,10,140);
msg="Underlined"+c3.getState();
g.drawString(msg,10,160);
}
public static void main(String args[])
{
Mycheckbox mc= new Mycheckbox();
mc.setTitle("My checkbox");
mc.setSize(400,400);
mc.setVisible(true);
}
}