[论坛提问] 求解决Java不同身份跳转代码

想实现不同身份跳转，但只能跳转管理员，求高手在代码上修改，方便的话加一下注释，谢谢
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class Login extends WindowAdapter implements ActionListener
{
JLabel imageLabel;
Frame f=new Frame("单机版考试系统");
Label l1=new Label("单机版考试系统");

Label l2=new Label("姓       名：");
TextField t2=new TextField();

Label l3=new Label("密       码：");
JPasswordField t3=new JPasswordField();

Label l4=new Label("考试地点：");
String items1[]={"请选择考试地点","电子学院","商贸学院","化工学院"};
JComboBox jcb1 = new JComboBox(items1);

Label ks=new Label("身份选择：");
String items[]={"学生","管理员"};
JComboBox jcb = new JComboBox(items);

Button b1=new Button("登录");
Button b2=new Button("重置");

public Login()
{
ImageIcon image=new ImageIcon("images/24.jpg");
      imageLabel = new JLabel(image);
      f.setBounds(400,200,340,350);
      f.setLayout(null);
      l1.setFont(new Font("隶书",Font.BOLD,30));
      l1.setForeground(Color.ORANGE);
      l1.setBounds(60,35,250,50);

      l2.setBounds(50,130,60,20);
      t2.setBounds(130,130,150,20);

      l3.setBounds(50,160,60,20);
      t3.setBounds(130,160,150,20);

      ks.setBounds(50,190,60,20);
      jcb.setBounds(130,190,150,20);

      l4.setBounds(50,220,60,20);
      jcb1.setBounds(130,220,150,20);
      b1.setBounds(60,300,100,20);
      b2.setBounds(200,300,100,20);
      imageLabel.setBounds(0, 0,360,350);
f.addWindowListener(this);
      b1.addActionListener(this);
      b2.addActionListener(this);
      jcb.addActionListener(this);
      jcb1.addActionListener(this);

        f.add(l1);
         f.add(l2);
         f.add(t2);

         f.add(l3);
         f.add(t3);

         f.add(ks);
         f.add(jcb);
         f.add(l4);
         f.add(jcb1);

         f.add(b1);
         f.add(b2);
         f.add(imageLabel);

         f.setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
if (e.getSource() == b2)
{
t2.setText("");
t3.setText("");
}
if (e.getSource() == b1)
{
String zkzh = t2.getText();
      String xm = t3.getText();  //姓名

      String dlsf =(String)jcb.getSelectedItem();
      String ksdd =(String)jcb1.getSelectedItem();

new  SQL();
Statement st;//向数据库发送sql语句
try
{
st=SQL.conn.createStatement();
String s="select * from Login where 姓名='"+zkzh+"' and 密码='"+xm+"' and 考试地点='"+ksdd+"' and 登录身份='"+dlsf+"' ";
ResultSet rs=st.executeQuery(s);
if(rs.next())
{

System.out.println(dlsf);
//if(dlsf==1)
JOptionPane.showMessageDialog(null,"欢迎管理员进入考试系统！");
new Administratormenu();
f.setVisible(false);
}
else
     {
     JOptionPane.showMessageDialog(null,"仔细一点哦，密码错了");
     t2.setText("");
     t3.setText("");
     }
}
catch(Exception  e3)
{
JOptionPane.showMessageDialog(null,"登录查询数据库出现异常！");
}
      }
}
public void windowClosing(WindowEvent e)
{
((Frame) e.getComponent()).dispose();
System.exit(0);
}
      public static void main(String args[])
{
new Login();
}
}

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[论坛提问] 求解决Java不同身份跳转代码

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