Java 如何更改位于单独线程上的textarea上的文本

我有一个应用程序，它连续（在单独的线程上运行）侦听特定端口，并在端口上有可用数据时打开Jframe。我必须将端口上接收到的数据放到JFrame上的文本区域。下面是我的代码

private void startListeningOnThePort(final ServerSocket listeningSocket) {

    Runnable listening = new Runnable() {

        public void run() {

                while (true) {
                    //System.out.println("Waiting for clients to connect...");
                    Socket clientSocket;
                try {
                        String readLine;                          
                        clientSocket = listeningSocket.accept();
                        BufferedReader reader =  new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
                        MessageWindow msgWindow = new MessageWindow();

                        while ((readLine = reader.readLine())!= null) {

                            System.out.println("The message received is "+readLine);
                            msgWindow.getPreviousMessageHistoryWindow().append(readLine+"\n");
                            //msgWindow.revalidate();
                            msgWindow.showMessageWindow();
                        }     
                } catch (IOException ex) {
                    Logger.getLogger(IntranetChatView.class.getName()).log(Level.SEVERE, null, ex);
                }

                }
        }
    };

    Thread serverThread = new Thread(listening);
    serverThread.start();

}

MessageWindow类包含具有文本区域的Jframe。只要端口上有可用数据，但未填充文本区域，就会显示Jframe。甚至调试也没有帮助

我认为问题在于获取textArea参考。可能对textArea的引用与我们想要设置的文本不同

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对此问题的任何帮助都将不胜感激。

将调用包装在

SwingUtilities.invokeAndWait（）中。

来自javadoc

  Causes <code>doRun.run()</code> to be executed synchronously on the
  AWT event dispatching thread.  This call blocks until
  all pending AWT events have been processed and (then)
  <code>doRun.run()</code> returns. This method should
  be used when an application thread needs to update the GUI.
  It shouldn't be called from the event dispatching thread.
  Here's an example that creates a new application thread
  that uses <code>invokeAndWait</code> to print a string from the event
  dispatching thread and then, when that's finished, print
  a string from the application thread.

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Swing是一个单线程框架，并且不是线程安全的，您永远不应该从事件调度线程的上下文之外创建或更新UI。有关更多详细信息，请参阅。如果可以，而不是使用<代码>线程< /代码>，您可以考虑使用<代码> SvigWorks，请参阅更多细节。如果你必须使用<代码>线程< /代码>，那么你应该使用<代码> SWIVITUTION.VIOKELATER 同步更新到EDT……考虑提供一个演示你的问题的方法。这将减少混乱和更好的响应

  Causes <code>doRun.run()</code> to be executed synchronously on the
  AWT event dispatching thread.  This call blocks until
  all pending AWT events have been processed and (then)
  <code>doRun.run()</code> returns. This method should
  be used when an application thread needs to update the GUI.
  It shouldn't be called from the event dispatching thread.
  Here's an example that creates a new application thread
  that uses <code>invokeAndWait</code> to print a string from the event
  dispatching thread and then, when that's finished, print
  a string from the application thread.