Perintah Update Statement

private void perintahUpdateStatement(String usernameMasuk, String filenameBaru) {

        PreparedStatement pernyataan;
        ResultSet hasil;
        String namaDB = "latihan_java";
        String namaTable = "data_user";
        String kondisi = " WHERE username = ?";

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

            // Update Statement bermula disini
            pernyataan = conn.prepareStatement("UPDATE " + namaTable + " SET filename = ?" + kondisi);
            pernyataan.setString(1, filenameBaru);
            pernyataan.setString(2, usernameMasuk);

            pernyataan.executeUpdate();

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

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

    }