Dúvida Exercício FJ 21

public Contato pesquisar(long id) {
        Contato contato = new Contato();
        try {
            PreparedStatement stmt = this.connection
                    .prepareStatement("select * from contatos where id=?");

            stmt.setLong(1, id);
            stmt.execute();

            ResultSet rs = stmt.executeQuery();

            while (rs.next()) {

                contato.setId(rs.getLong("id"));
                contato.setNome(rs.getString("nome"));
                contato.setEmail(rs.getString("email"));
                contato.setEndereco(rs.getString("endereco"));

                Calendar data = Calendar.getInstance();
                data.setTime(rs.getDate("dataNascimento"));
                contato.setDataNascimento(data);
            }
            rs.close();
            stmt.close();

        } catch (SQLException e) {
            // TODO Auto-generated catch block
            throw new DAOException(e.getMessage());
        }

        return contato;

    }