如何以编程方式关闭消息对话框？ [英] How to close message dialog programmatically?

问题描述

我对joptionpane有疑问。

I have a question about joptionpane.

使用JOptionPane.showMessageDialog（...），我们可以创建一个消息对话框。但是如何以编程方式关闭它？

Using JOptionPane.showMessageDialog(...), we can create a message dialog. But how to close it programmatically?

推荐答案

您可以通过获取它所持有的任何组件的WindowAncestor来获取对JOptionPane的引用，然后在返回的窗口上调用 dispose（）或 setVisible（false）。可以使用获取窗口SwingUtilities.getWindowAncestor（component）

You could always get a reference to the JOptionPane by getting the WindowAncestor of any component it's holding, and then call dispose() or setVisible(false) on the Window returned. The Window can be obtained by using SwingUtilities.getWindowAncestor(component)

例如：

import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;

public class CloseOptionPane {

   @SuppressWarnings("serial")
   private static void createAndShowGui() {
      final JLabel label = new JLabel();
      int timerDelay = 1000;
      new Timer(timerDelay , new ActionListener() {
         int timeLeft = 5;

         @Override
         public void actionPerformed(ActionEvent e) {
            if (timeLeft > 0) {
               label.setText("Closing in " + timeLeft + " seconds");
               timeLeft--;
            } else {
               ((Timer)e.getSource()).stop();
               Window win = SwingUtilities.getWindowAncestor(label);
               win.setVisible(false);
            }
         }
      }){{setInitialDelay(0);}}.start();

      JOptionPane.showMessageDialog(null, label);

   }

   public static void main(String[] args) {
      SwingUtilities.invokeLater(new Runnable() {
         public void run() {
            createAndShowGui();
         }
      });
   }
}

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