如何捕获JFrame的关闭按钮单击事件？

本文介绍了如何捕获JFrame的关闭按钮单击事件？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

当点击JFrame标题栏的红色关闭按钮时，我想调用方法 confirmExit（）。

I want to call a method confirmExit() when the red close button of the title bar of a JFrame is clicked.

如何捕获该事件？

如果用户选择不继续，我还想阻止窗口关闭。

I'd also like to prevent the window from closing if the user chooses not to proceed.

推荐答案

import javax.swing.JOptionPane; import javax.swing.JFrame; /*Some piece of code*/ frame.addWindowListener(new java.awt.event.WindowAdapter() { @Override public void windowClosing(java.awt.event.WindowEvent windowEvent) { if (JOptionPane.showConfirmDialog(frame, "Are you sure you want to close this window?", "Close Window?", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE) == JOptionPane.YES_OPTION){ System.exit(0); } } });

如果您还想阻止窗口关闭，除非用户选择是，您可以添加：

If you also want to prevent the window from closing unless the user chooses 'Yes', you can add:

frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);