程序代码：

import javax.swing.*;
import java.awt.*;
import java.sql.*;
import java.awt.event.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class Student extends JFrame{
       JLabel jlname = new JLabel("姓名 ：");
       static JTextField jtname= new JTextField();
       JLabel jlpass = new JLabel("学号 ：");
       static JTextField jtpass =new JTextField();
       static JButton jblogin = new JButton("登录");
       static JButton jbreset =new JButton("重置");
       public Student(String s){
           super(s);
           this.setLayout(null);
           jlname.setBounds(new Rectangle(20,30,60,30));
           jtname.setBounds(new Rectangle(80,30,180,30));
           jlpass.setBounds(new Rectangle(20,80,50,30));
           jtpass.setBounds(new Rectangle(80,80,180,30));
           jblogin.setBounds(new Rectangle(80,120,80,30));
           jbreset.setBounds(new Rectangle(170,120,80,30));
           this.add(jlname);
           this.add(jtname);
           this.add(jlpass);
           this.add(jtpass);
           this.add(jblogin);
           this.add(jbreset);
           this.setSize(355,254);
           this.setResizable(false);
           this.setVisible(true);
          

       }
       public static void main(String [] a){
           final Student nuex =new Student("学生信息管理系统");
           jblogin.addActionListener(new ActionListener(){
               public void actionPerformed(ActionEvent e){
                   methodA();   

                  

                }
           });
           jbreset.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    methodB();
                }
            });       

           nuex.addWindowListener(new WindowAdapter(){
            public void windowClosing (WindowEvent e){
                   System.exit(0);
               }
           

           });
              


       }
       public static void methodA(){
            JDialog d=new JDialog();
            JLabel c= new JLabel("登录成功",JLabel.CENTER);
            d.add(c);
            d.setSize(200,200);
            d.setVisible(true);
           

       }
       public static void methodB(){
            jtname.setText("");
            jtpass.setText("");
        }
      

      

}