Java PC

//Ej8
    public Map<String, Set<String>> getProductionAndFilms() {
        return films.parallelStream()
                .flatMap(film -> film.getProduction_companies().stream()
                        .map(company -> new AbstractMap.SimpleEntry<>(company, film.getOriginal_title())))
                .collect(Collectors.groupingBy(AbstractMap.SimpleEntry::getKey, Collectors.mapping(AbstractMap.SimpleEntry::getValue, Collectors.toSet())));
    }

    //EjExamen
    public Map<String, Set<String>> getMapExam() {
        return films.parallelStream()
                .filter(film -> film.getProduction_companies().contains("Marvel Studios"))
                .filter(film -> film.getRelease_date().contains("2010")
                        || film.getRelease_date().contains("2011")
                        || film.getRelease_date().contains("2012")
                        || film.getRelease_date().contains("2013")
                        || film.getRelease_date().contains("2014")
                        || film.getRelease_date().contains("2015"))
                .flatMap(film -> film.getProduction_companies().stream()
                        .map(company -> new AbstractMap.SimpleEntry<>(company, film.getOriginal_title())))
                .collect(Collectors.groupingBy(AbstractMap.SimpleEntry::getValue, Collectors.mapping(AbstractMap.SimpleEntry::getKey, Collectors.toSet())));
    }

    //EjExamen2
    public Map<String, Set<String>> getMapExam2() {
        return films.parallelStream()
                .filter(film -> film.getProduction_companies().contains("Marvel Studios"))
                .filter(film -> film.betweenDates("2010","2015"))
                .flatMap(film -> film.getProduction_companies().stream()
                        .map(company -> new AbstractMap.SimpleEntry<>(company, film.getOriginal_title())))
                .collect(Collectors.groupingBy(AbstractMap.SimpleEntry::getValue, Collectors.mapping(AbstractMap.SimpleEntry::getKey, Collectors.toSet())));
    }