PreparedStatement pst=con.prepareStatement("select * from Member_Registration where UserName1=? and Password1=?");
            pst.setString(1,id1);
            pst.setString(2,nm);
            ResultSet rs=pst.executeQuery();
            if(rs.next()){
                con.close();
            }
            else{
                JOptionPane.showMessageDialog(null,"Not registered user ! please try again later !!");
            }
        }
   }
   catch(Exception ee){
       JOptionPane.showMessageDialog(null, ee);
   }

}