Does a thread implicitly call notifyAll() , if other Threads are waiting on it?

Question

First thing i think i should say is that i am not looking for a solution , this is hwk , but it runs correctly , what would help me greatly is come clarification..

Answer 1

Thread calls notifyAll upon termination in support of the join functionality. This is documented in the Javadoc for Thread#join:

This implementation uses a loop of this.wait calls conditioned on this.isAlive. As a thread terminates the this.notifyAll method is invoked. It is recommended that applications not use wait, notify, or notifyAll on Thread instances.

There are essentially two conclusions then:

• If you want to wait until a Thread terminates, use join.
• If you want to use wait otherwise, do not use a Thread instance as a monitor.