Testing PriorityBlockingQueue in ThreadPoolExecutor

Question

I realized my ThreadPoolExecutor with PriorityBlockingQueue like in this example: https://stackoverflow.com/a/12722648/2206775

and wrote a test:

Prio         


        

Answer 1

You have 16 threads and only 5 tasks, meaning all of them are being executed concurrently and the priority is actually irrelevant.

The priority only matters when there are tasks waiting to be executed.

To show this, if you set your example to only use 1 thread, you will get your expected output.