example12_5.java

不错的教程 适合中高级人员的使用

import java.applet.*;import java.awt.*;import java.awt.event.*;
public class Example12_5 extends Applet implements Runnable
{  Thread left ,right; Graphics mypen; int x,y;
   public void init()
   {  left=new Thread(this);right=new Thread(this);
      x=10;y=10;mypen=getGraphics();
   }
   public void start()
   {  left.start();right.start();
   }
   public void run()
   {  while(true)
      { if(Thread.currentThread()==left)
         { x=x+1;
           if(x>240) x=10;
           mypen.setColor(Color.blue);
           mypen.clearRect(10,10,300,40); 
           mypen.drawRect(10+x,10,40,40); 
           try{  left.sleep(60);
              }
           catch(InterruptedException e){}
          }
        else if(Thread.currentThread()==right)
          {  y=y+1;
             if(y>240) y=10; mypen.setColor(Color.red); 
              mypen.clearRect(10,90,300,40); 
              mypen.drawOval(10+y,90,40,40);
              try{  right.sleep(60);
                 }
              catch(InterruptedException e){}
           }
      }
   }
   public void stop()
   {  left=null;right=null;
   }
}