import java.awt.*;
import java.awt.event.*;
	
public class MyFrameCanExit extends Frame implements WindowListener {
	public static void main(String args[ ]){
		MyFrameCanExit fr = new MyFrameCanExit("Hello !");
		fr.addWindowListener(fr);   //注冊窗口事件監聽器。
		fr.setSize(200,200);				
		fr.setBackground(Color.green);      
		fr.setVisible(true);				
	}
		  
	public MyFrameCanExit(String str){
		super(str);
	}
	
	public void windowClosing(WindowEvent e) { 
    	System.exit(0);
    }

    public void windowClosed(WindowEvent e) { }
    public void windowOpened(WindowEvent e) { }
    public void windowIconified(WindowEvent e) { }
    public void windowDeiconified(WindowEvent e) { }
    public void windowActivated(WindowEvent e) { }
    public void windowDeactivated(WindowEvent e) { }

}