btn2.java

笔记的管理

/*
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 */

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 btn2 extends JFrame{
JButton a1 = new JButton("作者");
JButton a2 = new JButton("主题");
JButton a3 = new JButton("题目");
JButton a4 = new JButton("日期");
public btn2() {
        super("查询");
        setLayout(new FlowLayout());
        add(a1);
        add(a2);
        add(a3);
        add(a4);
        setSize(300, 200);
        setVisible(true);

        a1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
        btn31 bt=new btn31();
        setVisible(false);
            }
        });

        a2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                btn32 bt=new btn32();
                setVisible(false);
            }
        });
        a3.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                btn33 bt=new btn33();
                setVisible(false);
            }
        });
        a4.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                btn34 bt=new btn34();
                
            }
        });

}
}