What is CyclicBarrier and CountDownLatch?

1.	What is CyclicBarrier and CountDownLatch?
Answer» CyclicBarrier and CountDownLatch, both are required for managing multithreaded programming. But there is some difference between them as given below: CyclicBarrier: It is a tool to synchronize threads processing using some algorithm. It enables a set of threads to wait for each other till they reach a common EXECUTION point or common barrier points, and then let them further continue execution. One can reuse the same CyclicBarrier even if the barrier is BROKEN by SETTING it. CountDownLatch: It is a tool that enables main threads to wait until mandatory operations are performed and completed by other threads. In simple WORDS, it MAKES sure that a thread waits until the execution in another thread completes before it starts its execution. One cannot reuse the same CountDownLatch once the count reaches 0.

Answer»

CyclicBarrier and CountDownLatch, both are required for managing multithreaded programming. But there is some difference between them as given below:

CyclicBarrier: It is a tool to synchronize threads processing using some algorithm. It enables a set of threads to wait for each other till they reach a common EXECUTION point or common barrier points, and then let them further continue execution. One can reuse the same CyclicBarrier even if the barrier is BROKEN by SETTING it.

CountDownLatch: It is a tool that enables main threads to wait until mandatory operations are performed and completed by other threads. In simple WORDS, it MAKES sure that a thread waits until the execution in another thread completes before it starts its execution. One cannot reuse the same CountDownLatch once the count reaches 0.

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