避免等待终止线程 [英] Avoid waiting for a terminated thread

问题描述

我遇到的问题是，在我打电话给 wait（）之前，有时我已经开始完成一个线程。这似乎导致我的程序等待不会再发生的事情（ notify（））。我怎样才能确保不等待完成的线程？

I'm having the problem that sometimes a thread that I've started finishes before I call wait() on it. It seems that this causes my program to wait for something that is not going to happen again (notify()). How can I make sure not to wait for a finished thread?

void someFunction() {

  MyThread thread = new MyThread();

  thread.start();

  // .. some stuff that takes sometimes quite long

  synchronized(thread) {
    try {
      thread.wait();
    } catch(InterruptedException e) {
      // ..
    }
  }
}

推荐答案

如果您阅读了线程的JavaDocs，它会告诉您从未使用在线程对象上等待，通知或notifyAll 。你应该使用join（）

If you read the JavaDocs for Thread, it tells you NEVER EVER use wait, notify, or notifyAll on Thread objects. You should use join()

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