总结:我知道他是一专多能型。很优秀~~~~~~~~~~~。好幸福啊
package com.a.b;
import java.awt.Color;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
public class Window {
public static void main(String[] args) {
//
final JFrame f = new JFrame("窗口的");
f.addWindowListener(new WindowAdapter() {
// 这里没有那个方法
public void actionPerformed(WindowEvent e) {// 这里的参数f还非的是final型的
int userSelect = JOptionPane.showConfirmDialog(f, "确定要退出吗?",
"你好", JOptionPane.YES_NO_OPTION);
if (userSelect == JOptionPane.YES_NO_OPTION) {
System.exit(0);
}
}
});
f.setBackground(Color.green);
f.setVisible(true);
f.setSize(500, 500);
f.setDefaultCloseOperation(3);
}
}