DB2 Connectivity Program in Java

import java.sql.*;
import java.awt.*;
import java.awt.event.*;
public class Db2 extends Frame implements ActionListener
{
ResultSet rs;
Label un,pw;
TextField una,pwd;
Button b1,b2;
Db2()
{
setSize(400,300);
setLocation(400,300);
setLayout(new FlowLayout());
un=new Label("Name");
pw=new Label("Password");
una=new TextField(10);
pwd=new TextField(10);
b1=new Button("Next");
b2=new Button("Previous");
add(un);
add(una);
add(pw);
add(pwd);
add(b1);
add(b2);
b1.addActionListener(this);
b2.addActionListener(this);


setVisible(true);


}
public void actionPerformed(ActionEvent ae)
{

try
{
rs=sql1.st.executeQuery("select * from login");
if(rs.next())
{
una.setText(rs.getString(1));
pwd.setText(rs.getString(2));


}
}
catch(Exception ee)
{
System.out.println(ee);
}


}
public static void main(String a[])
{
new Db2();
}
}