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    <p>JDK offers the Timer class. </p> <p><a href="http://java.sun.com/j2se/1.5.0/docs/api/java/util/Timer.html" rel="nofollow noreferrer">http://java.sun.com/j2se/1.5.0/docs/api/java/util/Timer.html</a></p> <p>Reading the docs clearly indicates that beyond the plumbing to make this a generalized framework, it uses nothing more sophisticated than a call to Object.wait(timeout):</p> <p><a href="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#wait(long)" rel="nofollow noreferrer">http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#wait(long)</a></p> <p>So, you can probably cut the chase an just use Object#wait yourself.</p> <p>Beyond those considerations, the fact remains that JVM can not guarantee time accuracy across platforms. (Read the docs on <a href="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/System.html#currentTimeMillis%28%29" rel="nofollow noreferrer">http://java.sun.com/j2se/1.5.0/docs/api/java/lang/System.html#currentTimeMillis()</a>)</p> <p>I think you'll need to experiment with a compromise solution combining Timer and busy polling if you want to want the highest timing precision possible on your platform. Effectively Object#wait(1) -> System#nanoTime -> calculate delta -> [loop if necessary].</p> <p>If you are willing to roll your own, JNI pretty much leaves it wide open for platform specific solutions. I am blissfully un-aware of Window's internals, but obviously if the host OS does provide sufficiently accurate realtime timer services, the barebones structure of setting up a timerRequest(timedelta, callback) native library shouldn't be beyond reach.</p>
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