Java thread pool to wait for termination

1, the polling isTerminated:

        while (!service.isTerminated()) {
            TimeUnit.SECONDS.sleep(1);
        }

2, the polling awaitTermination:

        while (!service.awaitTermination(1, TimeUnit.SECONDS)) {
        }

It represents a service thread pool object when the thread pool out of the while loop will automatically terminate. The principle of these two methods is actually the same. I am here to set up a poll once every 1s, you can control the polling interval as small as possible, in order to promptly respond to the logic thread pool after termination. Since both methods are blocked, so do not forget to interrupt exception handling.

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