java - 在GUI中动态更新JTextArea

Question

我正在尝试动态更新 JTextArea，我当前的代码如下:

Object buttonPressed = e.getSource();
if (buttonPressed.equals(uploadSend)){
 new Thread(){

   @Override public void run(){
  Upload send = new Upload();
  send.sendupload();
   for (String rec : uploadList.getUploadDetails()) {                 
       uploadDetails.append(rec.toString());
       uploadDetails.append("\n");
   }
}     
 }.start();
}

这是通过在按下 JButton 时发送 eupload 来实现的，并且 JButton 不再卡住，但在整个上传任务完成之前，JTextArea 中的文本仍然不会显示。

我已经阅读了有关 SwingWorker 的内容，这是我所缺少的吗？我将如何在这里实现它？

Answer 1

很难知道为什么您的文本区域没有更新，因为您没有提供足够的上下文来诊断问题，请考虑提供 runnable example这说明了你的问题。这将减少困惑并获得更好的响应

但是，如果您想将当前逻辑转换为使用 SwingWorker，您可以使用类似...

public class UploadWorker extends SwingWorker<List<String>, String> {

    @Override
    protected List<String> doInBackground() throws Exception {
        Upload send = new Upload();
        send.sendupload();
        for (String rec : uploadList.getUploadDetails()) {
            publish(rec);
        }
        return uploadList.getUploadDetails();
    }

    @Override
    protected void process(List<String> chunks) {
        for (String text : chunks) {
            uploadDetails.append(rec);
            uploadDetails.append("\n");
        }
    }

}

然后你只需使用类似的东西来调用它......

if (buttonPressed.equals(uploadSend)){
    UploadWorker worker = new UploadWorker();
    worker.execute();
}

看看Worker Threads and SwingWorker了解更多详情