ImageMoveCanvas.java

package com.godoro.samples.awt;

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

public class ImageMoveCanvas
  extends Canvas
  implements KeyListener
{

  private Image image1;
  private Image image2;
  private int x1 = 0;
  private int y1 = 0;
  private int x2 = 50;
  private int y2 = 50;

  public ImageMoveCanvas(Image image1, Image image2)
  {
    this.image1 = image1;
    this.image2 = image2;
    addKeyListener(this);
    java.util.Timer t = new java.util.Timer();
    TimerTask task = new TimerTask()
    {
      @Override
      public void run()
      {
        x2++;
        y2++;
        repaint();
      }
    };
    t.schedule(task, 0, 100);
  }

  @Override
  public void paint(Graphics g)
  {
    g.drawImage(image2, x2, y2, this);
    g.drawImage(image1, x1, y1, this);
  }

  @Override
  public void keyPressed(KeyEvent e)
  {
    int keyCode = e.getKeyCode();
    if (keyCode == KeyEvent.VK_LEFT) {
      x1--;
      repaint();
    } else if (keyCode == KeyEvent.VK_RIGHT) {
      x1++;
      repaint();
    } else if (keyCode == KeyEvent.VK_UP) {
      y1--;
      repaint();
    } else if (keyCode == KeyEvent.VK_DOWN) {
      y1++;
      repaint();
    }
  }

  @Override
  public void keyReleased(KeyEvent e)
  {
  }

  @Override
  public void keyTyped(KeyEvent e)
  {
  }

  public static void main(String[] args)
  {
    Frame frame = new Frame();
    frame.setBounds(10, 10, 300, 300);
    Toolkit toolkit = Toolkit.getDefaultToolkit();
    String folder = "C:\\Publishing\\JavaDeeply\\JavaBook\\JavaBook\\test";
    Image image1 = toolkit.getImage(folder + "\\cat.gif");
    Image image2 = toolkit.getImage(folder + "\\mouse.gif");
    ImageMoveCanvas canvas = new ImageMoveCanvas(image1, image2);
    frame.add(canvas);
    frame.setVisible(true);
    canvas.requestFocus();
  }
}