HANDLING KEYBOARD EVENTS

   Listeners are created by using one or more of the interfaces defined by the java.awt.event package.

     Example:

import java.awt.event.*;

import java.applet.*;

import java.awt.*;

public class MyKeyApplet extends Applet implements KeyListener

{

 String msg="";

 int x=10,y=40;

 public void init()

 {

  addKeyListener(this);

 }

 public void paint(Graphics g)

 {

  g.drawString(msg,x,y);

 }

 public void keyPressed(KeyEvent e)

 {

  int keycode=e.getKeyCode();

  switch(keycode)

  {

  

   case KeyEvent.VK_PAGE_UP:msg+=" Page UP ";

                                    break;

   case KeyEvent.VK_LEFT:msg+=" Left Arrow ";

                                 break;

  }

  repaint();

 }

 public void keyTyped(KeyEvent e)

 {

  msg+=e.getKeyChar();

  repaint();

 }

 public void keyReleased(KeyEvent e)

 {

  msg+="Key Released";

  repaint();

 } 

} 

OUTPUT:

In the above example, whenever a keyboard button is pressed, appropriate message is displayed on the applet screen. With the help of appropriate listener the various event generated through keyboard can be handled.