Monitoring AWT Events with the AWTEventListener Class

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

public class EventTest extends Frame {
   public EventTest(String title) {
      super(title);
   }
  
   void init()
   {
      setSize(100,100);
      setVisible(true);
      getToolkit().addAWTEventListener(new AWTEventListener() {
         public void eventDispatched(AWTEvent e) {
            System.out.println(e+"["+e.getID()+"]");
         }},
         AWTEvent.KEY_EVENT_MASK | AWTEvent.MOUSE_EVENT_MASK |
         AWTEvent.MOUSE_MOTION_EVENT_MASK);
   }

   public static void main (String args[]) {
      EventTest et=new EventTest("Monitoring events:");
      et.init();
   }
}