Perintah Select Statement

private void perintahSelectStatement() {

        PreparedStatement pernyataan;
        ResultSet hasil;
        String namaDB = "latihan_java";
        String namaTable = "data_user";

        try {
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/" + namaDB + "?" + "user=root");

            // Select Statement bermula disini
            pernyataan = conn.prepareStatement("SELECT * FROM " + namaTable);

            hasil = pernyataan.executeQuery();

            int nomer = 1;

            while (hasil.next()) {

                // mengambil kolom username dan filename dari table mysql
                System.out.print("data ke " + nomer + " " + hasil.getString("username") + " " + hasil.getString("filename"));

                nomer++;
            }

            pernyataan.close();
            conn.close();

        } catch (Exception ex) {
            JOptionPane.showMessageDialog(this, "Error ketika koneksi mysql!\n" + ex.getMessage());
        }

    }