Thread.join冻结进度条 [英] Thread.join freezes progressbar

问题描述

我有一个使用线程运行多个进度条的代码.

I have a code which uses a thread to run multiple progress bar.

Thread thread1 = new Thread(progressbar1);
thread1.start(); 
thread2.start()

以此类推.

thread1.join(); 
thread2.join(); 
thread3.join();

但是，这冻结了所有三个进度条动画，并且仅在完成所有线程后才显示完成. 如何解决这个问题呢? 谢谢.

But that freezes all three progress bar animation and shows the completion only when all threads are done. How to solve this problem? Thanks.

推荐答案

在

Doing any blocking operation on the Event Dispatch Thread will cause your GUI to become unresponsive and stop being repainted. That's why long-running operations should be done in a background thread.

似乎您知道您需要在后台线程中执行操作，但仍然希望阻止EDT.你不应该那样做.相反，您需要回调-一些代码将在后台线程完成运行后运行.

It seems like you know you need to do things in a background thread but still want to block the EDT. You shouldn't do that. Instead, you want a callback--some code that will be run once your background threads have finished running.

Java 6+中已经提供的回调机制是 SwingWorker .实施一个工作程序，将join()(和start() s)放入doInBackground()方法中.然后，您以后要执行的任何Swing操作都可以进入done().

An already provided callback mechanism available in Java 6+ is SwingWorker. Implement a worker, putting the join()s (and start()s) in the doInBackground() method. Then any Swing operations that you want to do afterward can go in done().

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