Creating WindowEvent using Applet and AWT

import java.awt.*;
import java.awt.event.*;
import java.applet.*;

class MyFrame extends Frame implements MouseMotionListener
{
   int x,y;
   String msg="";
   public MyFrame(String s)
   {
   super(s);
   setBackground(Color.yellow);
   setForeground(Color.blue);
   setSize(200,200);
   setVisible(true);


   //create an object to handle window events
   MyWindowAdapter adapter=new MyWindowAdapter(this);

   //register it to receive those events
   addWindowListener(adapter);

   //register it to receive its own mouse motion events
   addMouseMotionListener(this);
    }

    public void mouseDragged(MouseEvent me)
    {
        x=me.getX();
        y=me.getY();
        msg="Dragging mouse at ("+x+","+y+")";
        repaint();
    }
    public void mouseMoved(MouseEvent me)
    {
        x=me.getX();
        y=me.getY();
        msg="Moving mouse at ("+x+","+y+")";
        repaint();
    }
    public void paint(Graphics g)
    {
        g.drawString(msg,x,y);

    }
}

class MyWindowAdapter extends WindowAdapter
{
    MyFrame myframe;
    public MyWindowAdapter(MyFrame myframe)
    {
        this.myframe=myframe;
    }
    public void windowClosing(WindowEvent we)
    {
        myframe.setVisible(false);
    }
}

public class WindowEvents extends Applet
{
    Frame f;

    public void init()
    {
         f=new MyFrame("My first frame..");

    }
    public void start()
    {
        f.setVisible(true);
    }
    public void stop()
    {
        f.setVisible(false);
    }

    public void paint(Graphics g)
    {
        g.drawString("This is in applet window",10,50);

    }

}