hi
here is a class to make connectivity with Derby database. jndi name is
created for jdbc connectivity as jdbc/proformaInvoice
import com.maruti.proforma.dto.ConcreteLoginDTO;
import com.maruti.proforma.dto.LoginDTO;
import java.sql.*;
import java.util.*;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;

public final class Database {
   private static DataSource ds=null;
   private static Connection conn=null;
   private static InitialContext ic=null;
   private static Map <String,String> authMap=null;
   private static Statement stmt=null;
   private static ResultSet res=null;
   /** Creates a new instance of Database */
   private Database() {
   }
   public static void connect()
   {
       try
       {
               ic= new InitialContext(); //<----------here it gives
javax.naming.NoInitialContextException: Need to specify class name in
environment or system property, or as an applet parameter, or in an
application resource file:  java.naming.factory.initial

what is this exception for? what will I have to do then?
//rest is kept as to verify complete program
               DataSource
ds=(DataSource)ic.lookup("jdbc/proformaInvoice");
               conn=ds.getConnection();
       }
       catch(SQLException se){se.printStackTrace();}
       catch(NamingException ne){ne.printStackTrace();}
   }
   public static boolean validate(LoginDTO loginDTO)
   {
       boolean bnFlag;
       authMap=new HashMap<String,String>();
       try
       {
           if(conn == null){System.out.println("Conn is null");}
           stmt=conn.createStatement();
           res=stmt.executeQuery("Select User, Password from
UserMaster");
           while(res.next())
           {

authMap.put(res.getString("user").toUpperCase(),res.getString("password"));
               System.out.println(res.getString(1) + "
"+res.getString(2));
           }
           if(authMap.containsKey(loginDTO.getName()) &&
authMap.get(loginDTO.getName()).equals(loginDTO.getPassword()))
           {
               bnFlag=true;
           }
           else
           {
               bnFlag=true;
           }
       }
       catch(SQLException se){bnFlag=false;}
       return bnFlag;
   }
   public static void main(String[] args)
   {
       Database.connect();
       Database.validate(new ConcreteLoginDTO("LEO","leo"));
   }
}