Swing JTextArea多线程问题--InterruptedException [英] Swing JTextArea multithreading problem - InterruptedException

问题描述

我有一个简单的控制台应用程序，它在几个线程中运行计算（其中10-20个）。现在我正在尝试创建一个简单的GUI，允许我选择要处理的文件并打印来自所有线程的日志。

I have a simple console application that runs calculations in several threads (10-20 of them). Now I'm trying to create a simple GUI that allows me to select the file to process and prints logs from all threads.

所以，我用JTextArea创建了一个swing GUI对于我的日志和将信息记录到日志的方法：

So, I created a swing GUI with JTextArea for my log and a method to log information to the log:

public synchronized void log(String text) {
    logArea.append(text);
    logArea.append("\n");

    if (logArea.getDocument().getLength() > 50000) {
        try {
            logArea.getDocument().remove(0,5000);
        } catch (BadLocationException e) {
            log.error("Can't clean log", e);
        }
    }

    logArea.setCaretPosition(logArea.getDocument().getLength());
}

然而， setCaretPosition 方法有时在等待一些锁时死锁，而追加有时会抛出InterruptedException。

However, the setCaretPosition method sometimes deadlocks on waiting some lock, and append sometimes throws InterruptedException.

Exception in thread "Thread-401" java.lang.Error: Interrupted attempt to aquire write lock
at javax.swing.text.AbstractDocument.writeLock(AbstractDocument.java:1334)
at javax.swing.text.AbstractDocument.insertString(AbstractDocument.java:687)
at javax.swing.text.PlainDocument.insertString(PlainDocument.java:114)
at javax.swing.JTextArea.append(JTextArea.java:470)
at lt.quarko.aquila.scripts.ui.ScriptSessionFrame.log(ScriptSessionFrame.java:215)

我是Swing的新手，所以我无法理解我在这里做错了什么？

I'm a total newbie in Swing, so I can not understand what am I doing wrong here?

提前致谢。

推荐答案

你不想要直接从另一个线程操纵Swing对象，你想要对它的事件队列进行操作 。

You don't want to manipulate Swing objects directly from another thread, you want to post manipulations to it's event queue.

这篇关于Swing JTextArea多线程问题--InterruptedException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！