import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
 
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
 
public class CloseEventDemo extends JFrame
{
 public static void main(String[] args)
 {
 new CloseEventDemo();
 }
 
 public CloseEventDemo()
 {
 // 創(chuàng)建一個面板
 JPanel paContent = new JPanel(new FlowLayout(FlowLayout.CENTER));
 paContent.setPreferredSize(new Dimension(400, 100));
 // 在面板中創(chuàng)建一個按鈕用于關(guān)閉窗體
 JButton btn = new JButton("關(guān)閉");
 btn.setPreferredSize(new Dimension(100, 25));
 btn.addActionListener(new ActionListener()
 {
 
 public void actionPerformed(ActionEvent e)
 {
 closeFrame();
 }
 
 });
 // 向面板中加載按鈕
 paContent.add(btn);
 
 // 設(shè)置面板
 this.setTitle("Close Event Demo");
 this.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
 this.setContentPane(paContent);
 this.pack();
 this.setLocationRelativeTo(null);
 this.setVisible(true);
 this.addWindowListener(new WindowAdapter()
 {
 public void windowClosing(WindowEvent e)
 {
 System.out.println("觸發(fā)windowClosing事件");
 closeFrame();
 }
 
 public void windowClosed(WindowEvent e)
 {
 System.out.println("觸發(fā)windowClosed事件");
 }
 });
 }
 
 // 關(guān)閉窗體
 private void closeFrame()
 {
 System.out.println("調(diào)用窗體關(guān)閉功能");
 int result = JOptionPane.showConfirmDialog(null, "是否要退出？", "退出確認", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE);
 if (result == JOptionPane.YES_OPTION)
 this.dispose();
 }
}