CountDownLatches
CountDownLatch is a synchronization aid in Java's java.util.concurrent package. It allows one or more threads to wait until a set of operations being performed in other threads completes. The CountDownLatch is initialized with a given count. The await methods block until the current count reaches zero due to invocations of the countDown method, after which all waiting threads are released and any subsequent invocations of await return immediately. This is a one-shot phenomenon the count cannot be reset. If you need a version that resets the count, consider using a CyclicBarrier.
CountDownLatch is typically used to coordinate the start and end of a set of tasks. For example,
CountDownLatch can also be used to coordinate the start of a set of tasks. For example, a
CountDownLatch is a versatile synchronization aid that can be used in a variety of scenarios. It is