Answer to Question #285565 in Java | JSP | JSF for mmm

Question

MOVE ZOMBIE UP DOWN LEFT RIGHT CONTINUOSLY WITH ONE CLICK

public class j extends java.applet.Applet implements Runnable {

  Image z[] = new Image [2];

  Image crImg;

  Thread r;

  int x;

  int y;

  public void init() {

  String zSrc[] = {"z1.png", "z2.png",};

  for (int i = 0; i < zombies.length; i++) {

      z[i] = getImage(getCodeBase(), "images/" + zSrc[i]); }}

   public void start() {

    if (r == null) {

      r = new Thread(this);

      r.start();}}

 public void stop() {

    if (r != null) {

      r.stop();

      r = null;}

 void pause (int time) {

    try { Thread.sleep(time); }

    catch (InterruptedException e) { }

  }   

public void run() {

walk (0, size().width); }

void walk (int start, int end) {

for (int i = start; i < end; i += 1) {

 x = i;

 if (crImg == zombies[0])

 crImg = zombies[1];

 else crImg = zombies[0];

repaint();

pause(150);}}

public void paint(Graphics g) {

if (crImg != null)

 g.drawImage(crImg, x, y, width, height, this);

}

Answer 1

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

public class Keyboard1 extends Applet
   implements KeyListener, MouseListener {

   int width, height;
   int x, y;
   String s = "";

   public void init() {
      width = getSize().width;
      height = getSize().height;
      setBackground( Color.black );

      x = width/2;
      y = height/2;

      addKeyListener( this );
      addMouseListener( this );
   }

   public void keyPressed( KeyEvent e ) { }
   public void keyReleased( KeyEvent e ) { }
   public void keyTyped( KeyEvent e ) {
      char c = e.getKeyChar();
      if ( c != KeyEvent.CHAR_UNDEFINED ) {
         s = s + c;
         repaint();
         e.consume();
      }
   }

   public void mouseEntered( MouseEvent e ) { }
   public void mouseExited( MouseEvent e ) { }
   public void mousePressed( MouseEvent e ) { }
   public void mouseReleased( MouseEvent e ) { }
   public void mouseClicked( MouseEvent e ) {
      x = e.getX();
      y = e.getY();
      s = "";
      repaint();
      e.consume();
   }

   public void paint( Graphics g ) {
      g.setColor( Color.gray );
      g.drawLine( x, y, x, y-10 );
      g.drawLine( x, y, x+10, y );
      g.setColor( Color.green );
      g.drawString( s, x, y );
   }
}

http://www.dgp.toronto.edu/~mjmcguff/learn/java/05-keyboardInput/