交替打印ABC

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package test11;   public class PrintABC {       private static  int state = 0;       private static  final Object lock  = new Object();       public static void main(String[] args) {         Thread t1 = new Thread(new Runnable() {             @Override             public void run() {                 try{                     for (int i=0;i<100;i++){                         synchronized (lock){                             while (state%3 !=0){                                 lock.wait();                             }                             System.out.println("A");                             state++;                             lock.notifyAll();                         }                     }                   }catch(InterruptedException e){                     e.printStackTrace();                 }             }         });             Thread t2 = new Thread(new Runnable() {             @Override             public void run() {                 try{                     for (int i=0;i<100;i++){                         synchronized (lock){                             while (state%3 !=1){                                 lock.wait();                             }                             System.out.println("B");                             state++;                             lock.notifyAll();                         }                     }                   }catch(InterruptedException e){                     e.printStackTrace();                 }             }         });               Thread t3 = new Thread(new Runnable() {             @Override             public void run() {                 try{                     for (int i=0;i<100;i++){                         synchronized (lock){                             while (state%3 !=2){                                 lock.wait();                             }                             System.out.println("C");                             state++;                             lock.notifyAll();                         }                     }                   }catch(InterruptedException e){                     e.printStackTrace();                 }             }         });         t1.start();         t2.start();         t3.start();     }     }