使用可更新JProgressBar的Java Swing线程 [英] Java Swing Threading with Updatable JProgressBar

问题描述

首先，我最近一直在使用Java的Concurrency软件包，但是我发现了一个问题，我被困在了。我希望，应用程序和应用程序可以有一个 SplashScreen ，带有状态栏和其他数据的加载。所以我决定使用 SwingUtilities.invokeAndWait（在这里调用splash组件）。然后 SplashScreen 会出现一个 JProgressBar 并运行一组线程。但我似乎无法很好地处理事情。我查看了 SwingWorker 并尝试将其用于此目的，但线程只是返回。这是一些伪代码。以及我想要达到的要点。

First off I've been working with Java's Concurrency package quite a bit lately but I have found an issue that I am stuck on. I want to have and Application and the Application can have a SplashScreen with a status bar and the loading of other data. So I decided to use SwingUtilities.invokeAndWait( call the splash component here ). The SplashScreen then appears with a JProgressBar and runs a group of threads. But I can't seem to get a good handle on things. I've looked over SwingWorker and tried using it for this purpose but the thread just returns. Here is a bit of pseudo code. and the points I'm trying to achieve.

• 拥有一个具有 SplashScreen的应用程序加载信息时暂停


• 能够在 SplashScreen下运行多个线程


• 让 SplashScreen的进度条可以更新，直到所有线程完成后才退出。

• Have an Application that has a SplashScreen that pauses while loading info
• Be able to run multiple threads under the SplashScreen
• Have the progress bar of the SplashScreen Update-able yet not exit until all threads are done.

启动启动画面

try {
    SwingUtilities.invokeAndWait( SplashScreen );
} catch (InterruptedException e) {
} catch (InvocationTargetException e) { }

启动画面构造

SplashScreen extends JFrame implements Runnable{

    public void run() {
        //run threads
        //while updating status bar
    }
}

我尝试了很多东西，包括 SwingWorkers ，使用CountDownLatch的线程等等。 CountDownLatch实际上以我想要处理的方式工作但我无法更新GUI。当使用 SwingWorkers 时， invokeAndWait 基本上无效（这是他们的目的）或者它不会更新GUI甚至在使用 PropertyChangedListener 时也是如此。如果其他人有一些想法，那么听听他们会很棒。在此先感谢。

I have tried many things including SwingWorkers, Threads using CountDownLatch's, and others. The CountDownLatch's actually worked in the manner I wanted to do the processing but I was unable to update the GUI. When using the SwingWorkers either the invokeAndWait was basically nullified (which is their purpose) or it wouldn't update the GUI still even when using a PropertyChangedListener. If someone else has a couple ideas it would be great to hear them. Thanks in advance.

我实际上准备发布更好的代码来帮助找到我的解决方案。感谢所有帮助过的人。

I actually got ready to post better code to help out and found my solution. I thank you for all who helped.

推荐答案

无需调用invokeAndWait中的框架，但是你应该像这样更新进度条状态。

No need to call the frame inside invokeAndWait but you should update progress bar state like this.

try {
   SwingUtilities.invokeAndWait( new Runnable() {
     public void run() {
//update state of the progress bar here
     }
   });
 } catch (InterruptedException e) {
 } catch (InvocationTargetException e) { }

这篇关于使用可更新JProgressBar的Java Swing线程的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！