String sql = "select testFkt(?,?,?,?,?)";
    try (PreparedStatement preparedStatement = connection.prepareStatement(sql)) {
        preparedStatement.setInt(1, a
        preparedStatement.setInt(2, b);
        preparedStatement.setInt(3, c);
        preparedStatement.setByte(4, d);
        preparedStatement.setString(5, "test");
        try (ResultSet result = preparedStatement.executeQuery()) {

        }
    }