src/main/java/Main.java - master - Shcod/java-hw-core-StreamApi2

src/main/java/Main.java
38 строк2 KB
Shcod
first commit
07 авг 2026, 00:06
07 авг 2026, 00:06802b30e
import java.util.*;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) {
        List<String> names = Arrays.asList("Jack", "Connor", "Harry", "George", "Samuel", "John");
        List<String> families = Arrays.asList("Evans", "Young", "Harris", "Wilson", "Davies", "Adamson", "Brown");
        Collection<Person> persons = new ArrayList<>();
        for (int i = 0; i < 10_000_000; i++) {
            persons.add(new Person(
                    names.get(new Random().nextInt(names.size())),
                    families.get(new Random().nextInt(families.size())),
                    new Random().nextInt(100),
                    Sex.values()[new Random().nextInt(Sex.values().length)],
                    Education.values()[new Random().nextInt(Education.values().length)])
            );
        }
        long minorAge = persons.stream().filter(x -> x.getAge() < 18).count();

        List<String> militaryAge = persons.stream()
                .filter(x -> x.getSex() == Sex.MAN && x.getAge() >= 18 && x.getAge() <= 27)
                .map(Person::getFamily)
                .collect(Collectors.toList());


        List<Person> filteredList = persons.stream()
                .filter(x -> x.getEducation() == Education.HIGHER &&
                        ((x.getAge() >= 18 && x.getAge() <= 60 && x.getSex() == Sex.WOMAN)
                                || (x.getAge() >= 18 && x.getAge() <= 65 && x.getSex() == Sex.MAN)))
                .sorted(Comparator.comparing(Person::getFamily))
                        .collect(Collectors.toList());

        System.out.println("Minor age count: " + minorAge);
        System.out.println("Military age count: " + militaryAge);
        filteredList.stream().limit(100).forEach(System.out::println); // выводим первые 100 строк

    }
}