Timer: period less than a millisecond

Question

As the title, is there a way to get the Timer working under the threshold of a millisecond?

My question is similar the following one, but it is intended for Java: Thread.Sleep for less than 1 millisecond

You need to read this post http://www.rationaljava.com/2015/10/measuring-microsecond-in-java.html on this very subject. — Dan, Oct 28 '15 at 16:04
check this answer for a workaround: http://stackoverflow.com/a/35189397/4043486 — younes zeboudj, Feb 03 '16 at 23:04

assylias · Accepted Answer · 2012-05-10T14:35:49.967

11

If you want to sleep, Thread.sleep has 2 methods, one of which accepts nanoseconds. If you want to schedule a task, you can use a ScheduledExecutorService which schedule methods can use nanoseconds too.

As explained by @MarkoTopolnik, the result will most likely not be precise to the nanosecond.

edited May 10 '12 at 14:35

answered May 10 '12 at 14:30

assylias

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Thanks, I have used Executors.newSingleThreadScheduledExecutor() and it worked – Hamal000 May 10 '12 at 15:40
4

Source code of Thread.sleep(mills, nanos) shows just rounding up any nanos to 1 millicesond :) – user2602807 May 07 '17 at 11:30

score 4 · Answer 2 · edited May 23 '17 at 11:47

4

Thread.sleep(long millis, int nanos)

Also check out this answer with details on issues with this on Windows.

edited May 23 '17 at 11:47

Community

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answered May 10 '12 at 14:33

Marko Topolnik

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score 2 · Answer 3 · answered May 10 '12 at 14:32

You could wait on an object that nobody will notify...

synchronized (someObjectNobodyWillNotify) {
    try {
        someObjectNobodyWillNotify.wait(0, nanosToSleep);
    }
    catch (InterruptedException e) {
        Thread.interrupt();
    }
}

(In this scenario, I'm guessing spurious wakeups are okay. If not, you need to record your System.nanoTime() at the start and wrap the wait in a loop that checks that enough time has elapsed.)

score 1 · Answer 4 · answered May 10 '12 at 14:32

1

The java.util.concurrent package uses TimeUnit for timing. TimeUnit has a NANOSECONDS field.

answered May 10 '12 at 14:32

PeterMmm

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Timer: period less than a millisecond

4 Answers4