Java多线程wait和notify协作，按序打印abc

有一个经典的多线程面试题：启三个线程，按序打印ABC

上代码：

 package cn.javaBase.study_thread1;

 class MyRunnable1 implements Runnable {
     private Object prev;
     private Object self;
     private String name;

     public MyRunnable1(String n, Object p, Object s) {
         this.name = n;
         this.prev = p;
         this.self = s;
     }

     @Override
     public void run() {
         while (true) {
             synchronized (prev) {
                 synchronized (self) {
                     System.out.println(name);
                     self.notify();
                 }
                 try {
                     prev.wait();
                 } catch (InterruptedException e) {
                     e.printStackTrace();
                 }
             }
         }
     }
 }

 public class Thread5ABC {

     public static void main(String[] args) throws InterruptedException {
         Object a = new Object();
         Object b = new Object();
         Object c = new Object();

         MyRunnable1 ra = new MyRunnable1("a", c, a);
         MyRunnable1 rb = new MyRunnable1("b", a, b);
         MyRunnable1 rc = new MyRunnable1("c", b, c);

         new Thread(ra).start();;
         Thread.sleep(200);
         new Thread(rb).start();
         Thread.sleep(200);
         new Thread(rc).start();
         Thread.sleep(200);

     }
 }

打印的结果，就是循环的打印abcabcabcabc