java 8流-如何在映射后获取原始对象引用

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

class Person {
    private String name;

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

    public String getName() {
        return name;
    }
}

public class Main {
    public static void main(String[] args) {
        List<Person> persons = Arrays.asList(
                new Person("Alice"),
                new Person("Bob"),
                new Person("Charlie")
        );

        List<String> names = persons.stream()
                .flatMap(person -> Arrays.stream(person.getName().split("")))
                .toList();

        System.out.println(names);
    }
}