一道面试题

有三个线程ID分别是A、B、C,请有多线编程实现，在屏幕上循环打印10次ABCABC…
package com.thread;

public class TestWork implements Runnable {

 int index;  
    int pCount;
    static int count = 0; 
    static Object lock = new Object(); 
 public TestWork(int index)
 {
  this.index=index;
 }
 public void run() {
   synchronized (lock) {  
    for(;;)
    {
     if(count%3==index)
     {
      System.out.println(Thread.currentThread().getName());
      count++;
      pCount++;
      lock.notifyAll();
      if(pCount==10)
      {
       break;
      }
     }
     else
     {
      try {
       lock.wait();
      } catch (Exception e) {
       e.printStackTrace();
      }
     }
     
    }
   
   }
  

 }

 /**
  * @param args
  */
 public static void main(String[] args) {
  new Thread(new TestWork(0),"A").start();
  new Thread(new TestWork(1),"B").start();
  new Thread(new TestWork(2),"C").start();

 }

}