Hello!

In the example below the main thread leaves Thread.wait() although nobody
has called notify() or notifyAll(). Also no InterruptedException occurs.

Has anybody an idea, why this "works" nevertheless?

JVM: Java Sun JRE 1.5.0.10

Best regards
Andreas

public class ThreadWait implements Runnable {
   public static void main(String[] args) {
       try {
           Thread child = new Thread(new ThreadWait(), "Child-Thread");
           child.start();
           synchronized (child) {
               System.err.println("entering wait");
               child.wait();
               System.err.println("left wait");
           }
       }catch(Throwable t){
           t.printStackTrace();
       }
   }

   public void run(){
       try {
           System.err.println("entering sleep");
           Thread.sleep(2*1000);
           System.err.println("left sleep");
       }catch(Throwable t){
           t.printStackTrace();
       }
   }
}