java一个多线程的小程序，为啥他知执行了一次就不执行了，不是会一直并发式执行下去的吗？

public class StartDi implements Runnable{

Sound s

public StartDi(Sound s){

this.s=s

}

public void run(){

s.ding()

}

}

public class StartDo implements Runnable{

Sound s

public StartDo(Sound s){

this.s=s

}

public void run(){

s.dong()

}

}

这两个子类的春枝芹run方法搭颤都扒毕是只执行一次而已啊。

你可以改为

public class StartDi implements Runnable{

Sound s

public StartDi(Sound s){

this.s=s

}

public void run(){

while(true){

s.ding()

}

}

}

public class StartDo implements Runnable{

Sound s

public StartDo(Sound s){

this.s=s

}

public void run(){

while(true){

s.dong()

}

}

}

//槐如或jdk 7X，eclipse 3.7X测试通过

import java.awt.Graphics

import java.util.Date

import javax.swing.JFrame

public class Clock extends JFrame implements Runnable{

//窗口大小

final int WIDTH=300

final int HEIGHT=300

//用来获取当铅伍前时间

Date now

Clock(){

//装配桌面

setLocation(300,300)

setSize(WIDTH,HEIGHT)

setVisible(true)

setDefaultCloseOperation(EXIT_ON_CLOSE)

now=new Date()

}

public void paint(Graphics g){

//清屏

g.clearRect(0, 0, WIDTH, HEIGHT)

//写时间

g.drawString(now.toString(), 50, 50)

}

public void run() {

while(true){

try {

Thread.sleep(100)

} catch (InterruptedException e) {

}

now=new Date()

repaint()/橡滚/重绘

}

}

public static void main(String[] args){

(new Clock()).run()

}

}

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