Java Concurrency Programming: Countdownlatch, Cyclicbarrier, and Semaphore (summary)

　　

Here is a summary of the three auxiliary classes mentioned above:

1) Countdownlatch and Cyclicbarrier are capable of waiting between threads, except that they focus differently:

Countdownlatch is typically used when a thread a waits for several other threads to finish executing a task before it executes;

And Cyclicbarrier is generally used for a group of threads to wait for each other to a certain state, then this group of threads execute concurrently;

In addition, Countdownlatch cannot be reused, and cyclicbarrier can be reused.

2) Semaphore is actually a bit like a lock, which is typically used to control access to a group of resources.

Reference: 1, Java concurrency Programming: Countdownlatch, Cyclicbarrier, and semaphore

Java Concurrency Programming: Countdownlatch, Cyclicbarrier, and Semaphore (summary)