bton.java

笔记的管理

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package bt;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
/**
 *
 * @author Administrator
 */



public class bton extends JFrame {
    JButton a1 = new JButton("查询");
    JButton a2 = new JButton("添加");
   JButton a3=new JButton("退出");
  
    public bton() {
        super("笔记管理");
        setLayout(new FlowLayout());
        add(a1);
        add(a2);
        add(a3);
        setSize(300, 200);
        setVisible(true);

        a1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
         
                btn2 b2=new btn2();
         setVisible(false);
            } 
        });

        a2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                btn21 b=new btn21();
                setVisible(false);
            }
        });
        a3.addActionListener(new ActionListener() {
          public void actionPerformed(ActionEvent e) {
               System.exit(0);
            }
       });
    }
}