NotifyAll is not called. What is the use?

Question

Hi All,
Please check this program. I have two threads called in synchronized method of another class. notifyAll() in aMethod is never called. What's the purpose of notifyAll()...
public class ThreadTest
     public static void main(String args[])
          ThreadTest test = new ThreadTest();
          ThreadTest.Thread1 t1 = new ThreadTest().new Thread1();
          t1.start();
          ThreadTest.Thread2 t2 = new ThreadTest().new Thread2();
          t2.start();
     synchronized void aMethod()
          while(true){
          //some producing action goes here
          for(int i=0;i<100;i++)
          System.out.println("Called from aMethod "+i);
          try{
          System.out.println("before wait");
          wait();
          System.out.println("after wait");
          notifyAll();
          }catch (Exception e) {}
     class Thread1 extends Thread
          public void run()
               System.out.println("Called from Thread1");
               aMethod();
     class Thread2 extends Thread
          public void run()
               System.out.println("Called from Thread2");
               aMethod();
}

Answer 1

You call wait() in both threads, but there is nobosy to call notify() or notifyAll() to wake them up from the wait.
notify() and notifyAll() are for getting some other thread out of a wait()