在 Java 中将纳秒转换为毫秒和纳秒 < 999999
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原文地址: http://stackoverflow.com/questions/4300653/
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Conversion of nanoseconds to milliseconds and nanoseconds < 999999 in Java
提问by Chris Dennett
I'm wondering what the most accurate way of converting a big nanoseconds value is to milliseconds and nanoseconds, with an upper limit on the nanoseconds of 999999. The goal is to combine the nanoseconds and milliseconds values to ensure the maximum resolution possible with the limit given. This is for comparability with the sleep / wait methods and some other external library that gives out large nanosecond values.
我想知道将大纳秒值转换为毫秒和纳秒的最准确方法是什么，纳秒上限为 999999。目标是将纳秒和毫秒值结合起来，以确保最大分辨率可能与限制给。这是为了与睡眠/等待方法和其他一些给出大纳秒值的外部库进行比较。
Edit: my code looks like the following now:
编辑：我的代码现在如下所示：
while (hasNS3Events()) {
long delayNS = getNS3EventTSDelay();
long delayMS = 0;
if (delayNS <= 0) runOneNS3Event();
else {
try {
if (delayNS > 999999) {
delayMS = delayNS / 1000000;
delayNS = delayNS % 1000000;
}
EVTLOCK.wait(delayMS, (int)delayNS);
} catch (InterruptedException e) {
}
}
}
Cheers, Chris
干杯，克里斯
采纳答案by Ignacio Vazquez-Abrams
Just take the divmod of it with 1000000.
只需用 1000000 取它的 divmod 即可。
回答by Shawn Vader
Why not use the built in Java methods. The TimeUnit is part of the concurrent package so built exactly for you needs
为什么不使用内置的 Java 方法。TimeUnit 是并发包的一部分，因此完全满足您的需要
long durationInMs = TimeUnit.MILLISECONDS.convert(delayNS, TimeUnit.NANOSECONDS);
回答by Ibrahim Arief
For an ever shorter conversion using java.util.concurrent.TimeUnit, equivalent to what Shawn wrote above, you can use:
对于使用 更短的转换java.util.concurrent.TimeUnit，相当于 Shawn 上面写的内容，您可以使用：
long durationInMs = TimeUnit.NANOSECONDS.toMillis(delayNS);
