Java多线程多个线程wait()，一个notify()唤醒，唤醒的顺序

 package thread;

 public class ThreadWN implements Runnable {
     public String name;
     public String getName() {
         return name;
     }
     static int a = 9;
     public ThreadWN(String name) {
         this.name = name;
     }
     @Override
     public void run() {
         while (a > 0) {
             synchronized (ThreadWN.class) {
                 a--;
                 System.out.println("当前执行"+this.name+",并进入等待中......." );
                 try {
                     ThreadWN.class.wait();
                 } catch (InterruptedException e) {
                     e.printStackTrace();
                 }
             }
         }
     }

     public static void main(String[] args) throws InterruptedException {
         TestTH tth =new TestTH("唤醒");
         Thread t =new Thread(tth);
         ThreadWN wna = new ThreadWN("A");
         ThreadWN wnb = new ThreadWN("B");
         ThreadWN wnc = new ThreadWN("C");
         ThreadWN wnd = new ThreadWN("D");
         ThreadWN wne = new ThreadWN("E");
         ThreadWN wnf = new ThreadWN("F");
         Thread tha = new Thread(wna);
         Thread thb = new Thread(wnb);
         Thread thc = new Thread(wnc);
         Thread thd = new Thread(wnd);
         Thread the = new Thread(wne);
         Thread thf = new Thread(wnf);

         tha.start();
         Thread.sleep(10);
         thb.start();
         Thread.sleep(10);
         thc.start();
         Thread.sleep(10);
         thd.start();
         Thread.sleep(10);
         the.start();
         Thread.sleep(10);
         thf.start();
         Thread.sleep(10);
         t.start();

     }

 }
 class TestTH implements Runnable{

     private String name;

     public TestTH(String name) {
         this.name=name;
     }
     public String getName() {
         return name;
     }
     @Override
     public void run() {
         for (int i = 0; i < 6; i++) {
             synchronized (ThreadWN.class) {
                 try {
                     Thread.sleep(1000);
                 } catch (InterruptedException e) {
                     // TODO 自动生成的 catch 块
                     e.printStackTrace();
                 }
                 System.out.println(this.getName()+"进程："+"唤醒了一个线程！！！");
                 ThreadWN.class.notify();
                 }
             }
         }

 }