请问怎么会提示错误呢？

package com.xuanxuan;

public class Actor extends Thread {

public void run() {

System.out.println(getName()+"是一个演员");

int count=0;

boolean keepRuning=true;

while(keepRuning) {

System.out.println(getName()+"登台演出"+(++count));

if(count==100) {

keepRuning=false;

}

if(count%10==0) {

try {

Thread.sleep(2000);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

System.out.println(getName()+"演出结束了");

}

class Actress implements Runnable{

public void run() {

System.out.println(Thread.currentThread().getName()+"是一个演员");

int count=0;

boolean keepRuning=true;

while(keepRuning) {

System.out.println(Thread.currentThread().getName()+"登台演出"+(++count));

if(count==100) {

keepRuning=false;

}

if(count%10==0) {

try {

Thread.sleep(2000);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

System.out.println(Thread.currentThread().getName()+"演出结束了");

}

}

public static void main(String[] args) {

// TODO Auto-generated method stub

Thread actor=new Actor();

actor.setName("先生");

Thread actressThread=new Thread(new Actress(),"女士");

actor.start();

actressThread.start();

}

}