java - 如何使用 SwingWorker(外部类)触发对话框

Question

我一直在努力熟悉 Java 中 SwingWorkers 的使用。是否可以在 SwingWorker 的处理方法中从 GUI 触发显示对话框？

Answer 1

within a SwingWorker's process method

如果你的意思是:

a) 在 doInBackground() 内，

public Boolean doInBackground() {

  // caught exception half way e.g. login auth fail

  // 'push' into GUI layer (EDT)
  String text = "Your error here";
  publish(text);

  Boolean result = Boolean.TRUE;

  // continue with remaining process

  return result;
}

protected void process(List<Object> chunks) {
  String[] message = chunks.toArray(new String[chunks.size()]);

  // prompt user with dialog box
  JDialogBox.showMessageDialog(window, message);
}

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b) 在done()内，

protected void done() {
  // prompt user with dialog box
  String message;
  try {
    message = get();
  } catch (Exception e) {
    e.printStackTrace();
  }
  JDialogBox.showMessageDialog(window, message);
}

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c) 还是在 get() 之外？

SwingWorker sw = new SwingWorker() {.....;
sw.execute();

// some time later

final String message;
try {
  message = sw.get();
} catch (Exception e) {
  e.printStackTrace();
}

Runnable edt = new Runnable() {

  public void run() {
    JDialogBox.showMessageDialog(window, message);
  }
}

java.awt.EventQueue.invokeLater(edt);