addwindowlistener(new windowadapter())

import java.awt.*;
import java.awt.event.*;
import javax.swing.ImageIcon;
class Event1 extends Frame implements ActionListener{
Button but1,but2;
Label lbl1;
public Event1(){
super("Event Example");
addWindowListener(new WindowAdapter() {
public void windowClosing( WindowEvent e )
{ System.exit( 0 ); } } );
initialize();
}
public void initialize(){
setSize(300,200);
this.setLayout(null);
but1=new Button("but1");
but1.setBounds(10,40,70,25);
but1.addActionListener(this);
add(but1);
but2=new Button("but1");
but2.setBounds(105,40,70,25);
but2.addActionListener(this);
add(but2);
lbl1=new Label("0",Label.CENTER);
lbl1.setBounds(75,70,70,25);

lbl1.setForeground(Color.blue);
add(lbl1);
setVisi