windoweventtest.java

java图形界面的课堂代码

package day12;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class WindowEventTest {
	private JFrame jf;
	
	public WindowEventTest(){
		jf=new JFrame("Window Event Test!");
		addEventHandler();
	}
	
	public void addEventHandler(){
		jf.addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent arg0) {
				int op=JOptionPane.showConfirmDialog(jf,"确定要退出程序吗？","退出程序",JOptionPane.YES_NO_OPTION);
				if(op==JOptionPane.YES_OPTION){
					System.exit(0);
				}
			}
		});
	}
	
	public void showMe(){
		jf.setSize(400,300);
		jf.setVisible(true);
		jf.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		new WindowEventTest().showMe();

	}

}