How to delete the row from the Database by using servlet

Dear Sir/Madam

I am trying to delete the one user data in the Oracle SQL server database by using servlet program (Tomcat server).

The given data is true then the user data to be delete from the database table.

Assume in Database table have 25 users details are there.

I am given 6th (some n th row)user details true values even though while loop is not terminate, it checking until the end of table and always given else black statement. So what is my mistake in while loop explain and please give the solution to me.

My programe is:

import java.lang.*;

import java.io.*;

import java.sql.*;

import java.util.*;

import javax.servlet.*;

import javax.servlet.http.*;

public class JdbcUpdateServlet extends HttpServlet

{

    String name,pas,cde;

    String un,up,co;

    boolean flag=false;

     public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException
     {

        try

        {
            response.setContentType("text/html;charset=UTF-8");

            PrintWriter out = response.getWriter();

            response.setContentType("text/html");

            un=request.getParameter("uname");

            up=request.getParameter("pwd");

            co=request.getParameter("code");

            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

            Connection c=DriverManager.getConnection("jdbc:odbc:hari","raman","raman");

            Statement s=c.createStatement();

            s.executeQuery("select *from jduser");

            ResultSet rs=s.getResultSet();

            while(rs.next())

              {
                   name=rs.getString(1);
                   pas=rs.getString(2);
                   cde=rs.getString(3);
                    if(un.equals(name)&&up.equals(pas)&&co.equals(cde))
                    {
                        flag=true;
                        s.executeUpdate("delete from jduser where code='"+un+"'");
                        break;
                    }
              }
              if(flag==true)
                out.println(name+" User Data deleted successfully");
              else
                out.println("Sorry "+un+" user data is Not Available");

            s.close();
            c.close();
            out.close();
        }
        catch(IOException e)
        {
            System.out.println(e.getMessage());
        }
        catch(SQLException e)
        {
            System.out.println(e.getMessage());
        }
        catch(ClassNotFoundException e)
        {
            System.out.println(e.getMessage());
        }

    }
}