Java - 如何知道线程何时等待？ [英] Java - How to know when thread is waiting?

问题描述

是否有任何简洁的解决方案知道线程何时被放入等待状态？我将线程放到等待，并且我在需要时通知。但有时我想知道线程当前是否正在等待，如果是，我必须做其他事情。

Is there any neat solution of knowing when a thread has been put into wait status? I am putting threads to wait and I notify them when i need it. But sometimes I want to know if a thread is currently waiting, and if so, I have to do something else.

我可能自己设置一个标志为true / false 。但我无法想象还有更好的方法吗？

I could probably set a flag myself to true/false. But I can't imagine there is a better way to do this?

推荐答案

方法 getState（ ）一个线程返回一个 Thread.State ，它可以是：

The method getState() of a thread returns a Thread.State which can be:

NEW， RUNNABLE，BLOCKED，WAITING，TIMED_WAITING或TERMINATED

NEW, RUNNABLE, BLOCKED, WAITING, TIMED_WAITING or TERMINATED

参见 Thread.State 。

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