又一个简单的java applet图像移动重画实例

import java.awt.*; import java.applet.*; import java.awt.image.*; public class SerialImage extends Applet implements Runnable { int AppletWidth,AppletHeight,currentImage; Image Animation[],SerialImage,OffScreen; Thread newThread; Graphics drawOffScreen; MediaTracker MT; ImageProducer Source; CropImageFilter CutImage; public void init() { MT = new MediaTracker(this); Animation = new Image[8]; currentImage = 0; AppletWidth = getSize().width; AppletHeight = getSize().height; OffScreen = createImage(AppletWidth,AppletHeight); drawOffScreen = OffScreen.getGraphics(); SerialImage = getImage(getDocumentBase(),"run.gif"); MT.addImage(SerialImage,0); try { showStatus("图像载入中..."); MT.waitForAll(); this.setBackground(Color.blue); } catch(InterruptedException E) { E.printStackTrace(); } Source = SerialImage.getSource(); for(int i=0;i<8;i++) { CutImage = new CropImageFilter(i*128+3,0,128,141); Animation[i] = createImage(new FilteredImageSource(Source,CutImage)); drawOffScreen.drawImage(Animation[i],0,0,this); } } public void start() { newThread = new Thread(this); newThread.start(); } public void stop() { newThread = null; } public void paint(Graphics g) { drawOffScreen.setColor(Color.blue); drawOffScreen.fillOval(0,0,AppletWidth,AppletHeight); drawOffScreen.drawImage(Animation[currentImage],0,0,this); g.drawImage(OffScreen,0,0,this); } public void update(Graphics g) { paint(g); } public void run() { while(newThread != null) { repaint(); try { Thread.sleep(100); } catch(InterruptedException E){ } currentImage = (++currentImage) % 8; } } }