Problem with MouseEntered & MouseExited

Hello,

I have trouble using the MouseEntered() and MouseExited() methods.

My implemetation looks like this:

/* code starts here */
import java.applet.Applet;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.util.*;

public class x extends Applet implements Runnable, MouseListener, MouseMotionListener {
..
..
..
public void init () {
addMouseMotionListener(this);
addMouseListener(this);
}

public void destroy() {
removeMouseListener(this);
removeMouseMotionListener(this);
}
..
..
..

public void mouseEntered(MouseEvent e) {
System.out.println("debuginfo: mouseEntered");
// mouse handling code
}

public void mouseExited(MouseEvent e) {
System.out.println("debuginfo: mouseExited");
// mouse handling code
}

public void mouseClicked(MouseEvent e) {
System.out.println("debuginfo: mouseClicked");
}

public void mouseMoved(MouseEvent e) {
System.out.println("debuginfo: mouseMoved");
}

public void mouseDragged(MouseEvent e) {}

}
/* code ends here */

My problem is that both MouseEntered() and MouseExited() do not get called. The other
mouse methods work just fine. I have no trouble detecting mouse movement or detecting when
a button is clicked.

Does anyone know why the MouseEntered() and mouseExited methods do not work. Have I forgotten something? By the way: I am using JDK 1.2.2

Hendrik