public static int createReservation(Rezerwacja rez) {
        Connection connect;
        Statement statement;
        ResultSet resultSet;
        boolean b=true;
        int id = 0;
        int id2 = 5;
        try {
            Class.forName("com.mysql.jdbc.Driver");
            connect = DriverManager.getConnection("jdbc:mysql://localhost/kino?user=root");
            statement=connect.createStatement();
            b=statement.execute("INSERT INTO `rezerwacje`(`tytul`, `godzina`, `miejscaZar`, `nazwisko`) VALUES ('"+rez.getTitle()+"', '"+rez.getTime()+"', '"+rez.getTakenSeats()+"', '"+rez.getSurname()+"' );");
            if (statement != null) {
                statement.close();
            }
            if (connect != null) {
                connect.close();
            }
        } catch(Exception e) {
            e.printStackTrace();
        }

        try {
            Class.forName("com.mysql.jdbc.Driver");
            connect = DriverManager.getConnection("jdbc:mysql://localhost/kino?user=root");
            statement=connect.createStatement();
            resultSet = statement.executeQuery("select 'id' from rezerwacje where tytul = '"+rez.getTitle()+"' AND godzina = '"+rez.getTime()+"' AND miejscaZar = '"+rez.getTakenSeats()+"' AND nazwisko = '"+rez.getSurname()+"'");
            while (resultSet.next()) {

                id2 = resultSet.getInt(1);
System.out.println(id2);
            }

            if (resultSet != null) {
                resultSet.close();
            }
            if (statement != null) {
                statement.close();
            }
            if (connect != null) {
                connect.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return id2;
    }