Java ExecutorService pause/resume a specific thread?

You are on the wrong track. The thread pool owns the threads and by sharing them with your code could mess things up. You should focus on making your tasks (passed to the threads cancellable/interruptable) and not interact with the threads owned by the pool directly.

Additionally you would not know what job is being executed at the time you try to interrupt the thread, so I can't see why you would be interested in doing this.

Suggestion: Similarly to/instead of the flags you're using, create a semaphore with 1 permit (new Semaphore(1)) for each task you need to pause/unpause. At the beginning of the task's working cycle put a code like this.

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