什么定义了“活动”线？ [英] What defines an "active" thread?

问题描述

在Java并发中，什么使得线程活动？只是事实，它不是空转？

In Java concurrency, what makes a thread "active"? Just the fact that it's not idling? Is a "waiting" or "suspended" thread still considered, technically, active?

推荐答案

从我可以告诉的术语等待活动似乎被使用了很多，但从来没有定义。 ThreadGroup.enumerate（）方法记录到：

From what I can tell the term 'active' seems to be used a lot but not ever defined. The ThreadGroup.enumerate() method is documented to:

复制到指定的数组每个活动线程
组及其子组。

Copies into the specified array every active thread in this thread group and its subgroups.

和查看此的来源，它是检查 Thread.isAlive（） 方法并将它们添加到枚举。从这里我推断，术语活动和活着可互换，活着定义为：

and from looking at the source for this, it is checking the Thread.isAlive() method and adding those to the enumerable. From this I deduce that the terms 'active' and 'alive' are interchangeable and 'alive' is defined as:

如果它已经启动并且尚未死亡。

A thread is alive if it has been started and has not yet died.

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