如何使用Java streams在groupby之后应用排序和限制

import java.util.*;
import java.util.stream.Collectors;

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

    // 构造函数、getter和setter省略

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

    public String getCity() {
        return city;
    }

    public int getAge() {
        return age;
    }
}

public class StreamExample {
    public static void main(String[] args) {
        List<Person> people = Arrays.asList(
            new Person("Alice", 30, "New York"),
            new Person("Bob", 25, "New York"),
            new Person("Charlie", 35, "Los Angeles"),
            new Person("David", 40, "Los Angeles"),
            new Person("Eve", 28, "Chicago")
        );

        Map<String, List<Person>> result = people.stream()
            .collect(Collectors.groupingBy(Person::getCity))
            .entrySet().stream()
            .collect(Collectors.toMap(
                Map.Entry::getKey,
                entry -> entry.getValue().stream()
                    .sorted(Comparator.comparingInt(Person::getAge).reversed())
                    .limit(2)
                    .collect(Collectors.toList())
            ));

        result.forEach((city, persons) -> {
            System.out.println("City: " + city);
            persons.forEach(person -> System.out.println("  " + person.getName() + ", Age: " + person.getAge()));
        });
    }
}

City: New York
  Alice, Age: 30
  Bob, Age: 25
City: Los Angeles
  David, Age: 40
  Charlie, Age: 35
City: Chicago
  Eve, Age: 28