Keyboard Events in Java Applet

import java.applet.Applet; 
 import java.awt.*; 
 import java.awt.event.*; 
 /* <APPLET CODE ="AppletKeyboard.class" WIDTH=300 HEIGHT=200> </APPLET> */ 
 public class AppletKeyboard extends Applet implements KeyListener 
   { 
        TextField t,tt,tp,tr; 
         public void init() 
             { 
                 t=new TextField(20); 
                 t.addKeyListener(this); 
                 tt=new TextField(70); 
                 tp=new TextField(70); 
                 tr=new TextField(70); 
                 add(t); 
                 add(tt); 
                 add(tr); 
                 add(tp); 
             }  
                 public void keyTyped(KeyEvent e) 
                      { 
                          tt.setText("key Released"+e.getKeyChar()); 
                       }  
                           public void keyReleased(KeyEvent e) 
                              { 
                                  tr.setText("key Released"+e.getKeyChar()); 
                              }  
                                  public void keyPressed(KeyEvent e) 
                                     { 
                                        int kc; 
                                      String s; 
                                      kc=e.getKeyCode(); 
                                      s=e.getKeyText(kc); 
                                      tp.setText("Key Pressed"+s); 
                                   } 
    }