public class ArmRunnable implements Runnable {

/**

 * 军队runnable

 * 模拟双发作战的行为

 * 

 */

volatile boolean keepRuning=true;

@Override

public void run() {

while(keepRuning){

//发动5连击

for(int i=0;i<5;i++){

System.out.println(Thread.currentThread().getName()+"进攻对方["+i+"]");

//让出了处理器时间，下次该谁进攻还不一定呢！

Thread.yield();

}

}

System.out.println(Thread.currentThread().getName()+"结束了战斗！");

}

public class Stage extends Thread {

private final Object obj=new Object();

public void run(){

// TODO 自动生成的方法存根

System.out.println("隋唐演义上演，大幕徐徐拉开");

try {

Thread.sleep(2000);

} catch (InterruptedException e) {

// TODO 自动生成的 catch 块

e.printStackTrace();

}

//军队登场

ArmRunnable suijun=new ArmRunnable();

ArmRunnable  qiyijun=new ArmRunnable();

//构建两个线程

Thread sui=new Thread(suijun,"隋军");

Thread nong=new Thread(qiyijun,"农民起义军");

sui.start();

nong.start();

suijun.keepRuning=false;

qiyijun.keepRuning=false;

不知道我又错在哪里了？