嵌套属性值上的Collections.sort()

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        // 创建包含嵌套属性的对象集合
        List<Person> personList = new ArrayList<>();
        personList.add(new Person("Alice", new Address("New York")));
        personList.add(new Person("Bob", new Address("London")));
        personList.add(new Person("Charlie", new Address("Paris")));

        // 使用Collections.sort()方法对对象集合进行排序
        Collections.sort(personList, new Comparator<Person>() {
            @Override
            public int compare(Person p1, Person p2) {
                // 比较嵌套属性的值
                return p1.getAddress().getCity().compareTo(p2.getAddress().getCity());
            }
        });

        // 输出排序结果
        for (Person person : personList) {
            System.out.println(person.getName() + " - " + person.getAddress().getCity());
        }
    }
}

class Person {
    private String name;
    private Address address;

    public Person(String name, Address address) {
        this.name = name;
        this.address = address;
    }

    public String getName() {
        return name;
    }

    public Address getAddress() {
        return address;
    }
}

class Address {
    private String city;

    public Address(String city) {
        this.city = city;
    }

    public String getCity() {
        return city;
    }
}