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可以运行的最大 Swing 工作线程数是多少

发布于 2024-12-19 03:05:02 字数 57 浏览 1 评论 0原文

可以运行的 Swing Worker 线程数是否有上限，或者是内存支持的上限？这也可以在某处配置吗？

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拿命拼未来 2024-12-26 03:05:02

SwingWorker 本身不是线程，而是将在线程中执行的任务。通常，您会使用 ExecutorService 来执行 SwingWorker 的实例；该接口还允许设置线程数：

 int n = 20; // Maximum number of threads
 ExecutorService threadPool = Executors.newFixedThreadPool(n);
 SwingWorker w; //don't forget to initialize
 threadPool.submit(w);

现在，如果您提交超过 n 个 SwingWorker 实例，它们将必须排队并等待，直到池中的线程可用。

A SwingWorker is not a thread itself but a task that will be executed in a thread. Usually, you would use an ExecutorService to execute instances of SwingWorker; this interface also allows to set the number of threads:

 int n = 20; // Maximum number of threads
 ExecutorService threadPool = Executors.newFixedThreadPool(n);
 SwingWorker w; //don't forget to initialize
 threadPool.submit(w);

Now, if you submit more than n SwingWorker instances, they'll have to queue up and wait until a thread from the pool gets available.

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病毒体 2024-12-26 03:05:02

final int corePoolSize = 100;
final int maximumPoolSize = 100;
final long keepAliveTime = 100000;
final TimeUnit unit = TimeUnit.SECONDS;
final BlockingQueue<Runnable> workQueue = new ArrayBlockingQueue<>(maximumPoolSize);
sun.awt.AppContext.getAppContext().put(SwingWorker.class,
                 new ThreadPoolExecutor(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue));

上面的代码示例将允许您执行超过默认数量的 SwingWorkers。当然，它正在访问一些后门 sun.awt.AppContext 类，但对于那些感兴趣但无法/不愿意提供自己的 ExecutorService 的人来说，这是一个快速解决方法。

final int corePoolSize = 100;
final int maximumPoolSize = 100;
final long keepAliveTime = 100000;
final TimeUnit unit = TimeUnit.SECONDS;
final BlockingQueue<Runnable> workQueue = new ArrayBlockingQueue<>(maximumPoolSize);
sun.awt.AppContext.getAppContext().put(SwingWorker.class,
                 new ThreadPoolExecutor(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue));

The above code sample will allow you to have more than the default number of SwingWorkers executing. Of course it is accessing some backdoor sun.awt.AppContext class, but it is a quick workaround for those interested, and not able/willing to provide their own ExecutorService.

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