Cursor setting problem

Question

Below is a simple example of a frame that contains a button to call a method (longProcess()) that takes some time to execute. While longProcess is executing, the cursor is changed to an hour-glass. The problem I have is that when the cursor leaves the frame, it turns back to an arrow. Can you suggest an event listener that I can use to detect that the cursor is entering the frame, so that I can set the cursor back to an hour-glass?
Thanks for your help.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class TestDialog {
  public static void main(String[] args) {
    JFrame frame = new TestFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.show();
class TestFrame extends JFrame {
  public TestFrame() {
    setTitle("Dialog Test");
    setSize(400, 350);
    Container contentPane = getContentPane();
    JButton button = new JButton("Run");
    contentPane.add(button);
    button.addActionListener(
      new ActionListener() {
        public void actionPerformed(ActionEvent event) {
          setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
          longProcess();
          setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
    setVisible(true);
  void longProcess() {
    try {
      Thread.sleep(10000);
    catch (InterruptedException ex) {
}

Answer 1

You want to look for mouse motion. Try
    Toolkit.getDefaultToolkit().addAWTEventListener(
        someListener, AWTEvent.MOUSE_MOTION_EVENT_MASK  );or
    someComponent.addMouseMotionListener( someListener );