The java interpreter got stuck(didn't exit) when there is a suspended thread.
The call to t.stop() didn't kill the thread t when the thread t is suspended.
There is no exception to be thrown when calling t.resume() after invoking
t.suspend() and t.stop().

---code---

class jotter extends Thread {
  int count = 0;

  jotter(String n)
  {
    super(n);
  }

  public int getcount()
  {
    System.out.println("The current thread is : " + Thread.currentThread().getName());
    return count;
  }

  public void run() {

    while ( true ) {
      count++;
      System.out.println(count + ": I will be suspended.");

      // computation ...
      for(int j =0; j < 50000; j++) ;

      Thread.currentThread().sleep(5);
      System.out.println(count + ": I'm back");
    }
  }
}

class threadtest12 {
  public static void main(String args[]) {
    int i= 0;
    jotter jt = new jotter("jotter");

    jt.start();

    Thread.currentThread().setName("mainthread");
    // let the jotter run
    Thread.currentThread().yield();

    // idle
    for(int j=0; j < 10000; j++) ;

    // resume the child thread
    jt.suspend();

    Thread.currentThread().sleep(100);

    //we still call the method jt.getcount() though
    //thread jt is suspended
    System.out.println(jt.getcount());
 
    // if we don't resume thread jt here, the call
    // jt.stop() won't take effect.

// jt.stop();
 
    Thread.currentThread().sleep(100);
 
    System.out.println("ok");

  }
}