使用JavaStream将List转为Map

import java.util.*;
import java.util.stream.Collectors;
public class Main {
    public static void main(String[] args) {
        List<Person> people = Arrays.asList(
                new Person("Alice", 25),
                new Person("Bob", 30),
                new Person("Charlie", 35)
        );
        Map<String, Integer> ageByName = people.stream()
                .collect(Collectors.toMap(Person::getName, Person::getAge));
        System.out.println(ageByName);
    }
}
class Person {
    private String name;
    private int age;
    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }
    public String getName() {
        return name;
    }
    public int getAge() {
        return age;
    }
}