java程序！！求大神修改一下！想让动画循环播放

Question

package luoye;

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

public class luoye extends Applet implements Runnable{
Image shu,ye1,ye2,ye3,ye4;
int x1 = 320,y1 = 300;
int x2 = 160,y2 = 295;
int x3 = 270,y3 = 320;
int x4 = 105,y4 = 310;   

public void playsound(){
AudioClip audioClip=getAudioClip(getCodeBase(),"1324.wav");
audioClip.loop();
}
public void init(){
playsound();
setSize(700,400);
shu = getImage(getCodeBase(), "shu.jpg");   
    ye1 = getImage(getCodeBase(), "ye1.jpg");   
    ye2 = getImage(getCodeBase(), "ye2.jpg"); 
    ye3 = getImage(getCodeBase(),"ye3.jpg");
    ye4 = getImage(getCodeBase(),"ye4.jpg");
    }
public void paint(Graphics g){
g.drawImage(shu, 0, 0, 500, 400, this);
g.drawImage(ye1, x1, y1, 20, 20, this);
g.drawImage(ye2, x2, y2, 20, 20, this);
g.drawImage(ye3, x3, y3, 20, 20, this);
g.drawImage(ye4, x4, y4, 20, 20, this);
}

public void start() {   
    Thread ye1 = new Thread(this, "ye1");   
    Thread ye2 = new Thread(this, "ye2"); 
    Thread ye3 = new Thread(this,"ye3");
    Thread ye4 = new Thread(this,"ye4");
    ye1.start();   
    ye2.start(); 
    ye3.start();
    ye4.start();
}   

public void run() {   
    boolean stop = false;   
    while (!stop) {   
       try {   
            Thread.sleep(100); 
            x1=x1-1;
            y1=y1+5;
            x2=x2-1;
            y2=y2+5;
            x3=x3-1;
            y3=y3+5;
            x4=x4-1;
            y4=y4+5;
        String threadName = Thread.currentThread().getName();   
        if (threadName.equals("ye1")) {    
            if (y1 == 400) {   
            //stop = true; 
            x1 = 320;
            y1 = 300;
     Thread.sleep(1000);
            }   
        } else if (threadName.equals("ye2")) {   
            if (y2 == 400) {   
            //stop = true; 
            x2 = 170;
            y2 = 295;
     Thread.sleep(1000);
            }   
        } else if(threadName.equals("ye3")){
        if (y3 == 400) {  
        //stop = true; 
                x3 = 270;
    y3 = 320;
    Thread.sleep(1000);
        }
        }
        else if(threadName.equals("ye4")){
        if (y4 == 400) {   
        //stop = true; 
                x4 = 105;
       y4 = 310;
       Thread.sleep(1000);
     }
        }
       }
         catch(Exception e){}
         repaint(); 
    }
    }
}

Answer 1

把循环判断里的“==”换成“>”