How to prompt a confirmation dialog box in the middle of non event dispatching thread

Question

I have the following fun which will be executed by non event dispatching thread. In the middle of thread, I want a

1. A confirmation box pop up. Thre

Answer 1

public int fun() throws InterruptedException, InvocationTargetException {
    // The following code will be executed by non event dispatching thread.
    ChoiceRunnable runabble = new ChoiceRunnable();
    SwingUtilities.invokeAndWait(runabble);

    return runabble.choice;
  }

  class ChoiceRunnable implements Runnable {
    private int choice;

    public void run() {
      choice = JOptionPane.showConfirmDialog(SaveToCloudJDialog.this, message, title, JOptionPane.YES_NO_OPTION);
    }
  }