当父进程退出时，Java 守护进程线程是否会自动终止? [英] Are Java daemon threads automatically killed when their parent exits?

问题描述

如果一个线程创建了一个守护线程，是否可以依赖父线程退出run方法，子线程也会终止?

If a Thread creates a daemon Thread, can I rely on the fact that when the parent exits the run method, the son will also terminate?

推荐答案

否 - 线程是独立的.一个线程拥有"另一个线程并强制终止是没有意义的.

No - threads are independent. There's no sense of one thread "owning" another and forcing termination.

如果您真的询问是否当应用程序中的所有非守护线程都死了，您可以依靠进程消亡:是的，您可以.但这就是您可以依赖的全部.

If you're really asking whether when all the non-daemon threads in the application have died, you can rely on the process dying: yes, you can. But that's all you can rely on.

特别是，如果有两个非守护线程，每个都创建了一个守护线程，并且一个非守护线程终止，那么剩下的三个线程会继续运行.

In particular, if there are two non-daemon threads, each of which has created a daemon thread, and one of the non-daemon threads terminates, then the remaining three threads will continue running.

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