Java8使用streams从类对象中提取多个字段

import java.util.Arrays;
import java.util.List;

class Person {
    private String name;
    private int age;
    private String occupation;

    public Person(String name, int age, String occupation) {
        this.name = name;
        this.age = age;
        this.occupation = occupation;
    }

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    public String getOccupation() {
        return occupation;
    }
}

public class Main {
    public static void main(String[] args) {
        List<Person> people = Arrays.asList(
                new Person("Alice", 25, "Engineer"),
                new Person("Bob", 30, "Teacher"),
                new Person("Charlie", 35, "Doctor")
        );

        List<String> names = people.stream()
                .map(Person::getName)
                .collect(Collectors.toList());

        List<Integer> ages = people.stream()
                .map(Person::getAge)
                .collect(Collectors.toList());

        List<String> occupations = people.stream()
                .map(Person::getOccupation)
                .collect(Collectors.toList());

        System.out.println("Names: " + names);
        System.out.println("Ages: " + ages);
        System.out.println("Occupations: " + occupations);
    }
}

Names: [Alice, Bob, Charlie]
Ages: [25, 30, 35]
Occupations: [Engineer, Teacher, Doctor]