如何等待所有线程(可变数量的线程)完成与Main的连接? [英] How to wait for all threads (variable number of threads) to finish to move on with Main?

问题描述

我将根据for循环中的用户输入创建多个线程.因此，我将无法为其指定名称.有没有一种方法可以等待所有人完成我的主线程?我希望他们能够完成for循环.我知道我需要使用联接，但是有许多线程，我将如何使用它?还是有另一种方法?会是这样的:

I will make many threads according to user input in a for loop. Therefore I won't be able to assign names for them. Is there a way to wait all of them to finish to move on with my main thread? I want them to be finished out of that for loop. I know I need to use a join but with many many threads, how will I use it? Or is there another way? It will be like this:

for(int i = 0; i<inputs.size(); i++)
  new SimpleThread(parameters).start();

仅使用主线程继续，其他线程完成.

go on with only main thread, others finished.

我该怎么做?

推荐答案

将线程存储在List<Thread>中，然后迭代该列表并使用thread.join()

Store the threads in a List<Thread>, then iterate the list and use thread.join()

您也可以查看java.util.concurrent辅助工具. CyclicBarrier 或CountDownLatch (由其他人指出).

You can also take a look at java.util.concurrent aids. CyclicBarrier or CountDownLatch (as indicated by others) for example.

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