Kindly help me out with this prepared statement

Question

Hi All,
I am having some problem with this code.The databaseUsername and databasePassword seem to be printing only null, what could be the problem.
AFIAK, it is not going into the while loop itself.
Help would be greatly appreciated.
TIA
AS
try {
              String sql = "SELECT username, password FROM admintable WHERE username = ? AND password = ?";
            PreparedStatement stmt = null;
            ResultSet rs = null;
            stmt=con.prepareStatement(sql);
            stmt.setString(1, username);
            stmt.setString(2, password);
            rs = stmt.executeQuery();
            String databaseUsername = null;
            String databasePassword = null;
            while (rs.next()){
                databaseUsername=rs.getString("username");
                databasePassword=rs.getString("password");
                 System.out.println("Values are Username " + databaseUsername);
                 System.out.println("Values are Password "+ databasePassword);
             rs.close();
             stmt.close();

Answer 1

Hi Again,
I would like to tell that there is only one entry in the database table.
String sql = "SELECT username, password FROM professorforminfo.admintable WHERE username = ? AND password = ?";
            PreparedStatement stmt = null;
            ResultSet rs = null;
            stmt=con.prepareStatement(sql);
            stmt.setString(1, username);
            stmt.setString(2, password);
            rs = stmt.executeQuery();
            String databaseUsername = null;
            String databasePassword = null;
            while (rs.next()){
                databaseUsername=rs.getString("username");
                databasePassword=rs.getString("password");
                 System.out.println("Username value " + databaseUsername);
                 System.out.println("Password value "+ databasePassword);
              }catch(SQLException sqlEx){
                   System.err.println("Unable to connect to DB");
                   sqlEx.printStackTrace();
             rs.close();
             stmt.close();Why do you think that the databaseUsername and databasePassword has null values in them.
Kindly help me out.
Thanking you
AS