Run the Main.main() method seems like a deadlock has occurred. I found out it can be fixed if replace notify() with notifyAll(). But why? Shouldn't the worst ca
I consider that main thread must end after sub thread. However, below code shows the process finished before print the "async end". What is th
I'm not getting the rationale behind negative permits during initialization of Semaphore (java.util.concurrent.Semaphore). I do know that calls to release() met
I'd like to have one BlockingMap data structure which is very similar to BlockingQueue. The take method of BlockingQueue will wait there until element is availa