如何限制同时运行的线程数

Question

Let's say i've got a list which holds 100 threads inside it.

i want to allow only 5 threads run simultaneously until all my threads in list have done their job.

i also can't use the java threadpool for this task.

could you give me a clue how to bound the number of my running threads?

Answer 1

I think what you need is semaphore . Check the doc. Briefly speaking, semaphore is a locking method. You ask the resource from the semaphore singleton class, which is process scope unique, control the running number of function process.