at.java

来自「经典的java applet小程序下来看看说不定有启发哦」· Java 代码 · 共 58 行

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
public class At extends Applet implements Runnable{
   int delay;
   Thread  Thread1;
   Image theMI,mI;
   Graphics backGraphics;
   MediaTracker  tracker;
   int x=0;
   int y=0;  
   public void init(){
      mI=getImage(getDocumentBase(),"p1.gif"); 
      tracker=new	MediaTracker(this);   
      tracker.addImage(mI,0); 
	 
      try{
		tracker.waitForID(0);    //图像跟踪技术   
      }catch(Exception  e){}          
   }
   public void start(){
      if (Thread1==null){
            Thread1 = new Thread(this,"t1");
      	    Thread1.start();   
      }      
   }
   public void run() {
    String s = Thread.currentThread().getName();
    System.out.println("----------"+ "t1" + "----"); 
    
   
      while(true){
	x=x+1;y=y+1;
	theMI=createImage(getSize().width,getSize().height);
        backGraphics=theMI.getGraphics();
        backGraphics.drawImage(mI,x,y,this);//双缓冲技术
        repaint();
        try{
          Thread.sleep(100);
        }catch(InterruptedException e){}
      
      } 
   }
   public void paint(Graphics g)  {
     if (theMI!=null){
     	 g.drawImage(theMI,x,y,this);
    }
  }
   public void update(Graphics g){
	paint(g);
   }
  
   public void stop(){
    
    Thread1=null;
   } 
}