/* draw a character that can be moved with arrow keys */

       import java.awt.*;
       import java.applet.*;

       public class Keys extends Applet {

         char currkey = 'Q';      // set initial value to Q    
         int currx;
         int curry;

         public void init() {

           currx = size().width / 2;   // start character in center
           curry = size().height / 2;
           setBackground(Color.green);
           setFont(new Font("Helvetica",Font.BOLD,36));
           requestFocus();             // request the input focus
         }

         public boolean mouseDown (Event evt , int  x, int y) {
         curry = y;
         currx = x;
         return true;
         }


         public boolean keyDown(Event evt, int key) {
           switch (key) {
           case Event.DOWN: 
             curry += 5;
             break;
           case Event.UP: 
             curry -= 5;
             break;
           case Event.LEFT:
             currx -= 5;
             break;
           case Event.RIGHT:
             currx += 5;
             break;
           default:
             currkey = (char)key;
           }

           repaint();
           return true;
         }


         public void paint(Graphics g) {
             g.drawString(String.valueOf(currkey), currx,curry);
         }
       }