在Java中实现朋友功能

public class Friend {
    private String name;
    private int age;
    private String gender;

    public Friend(String name, int age, String gender) {
        this.name = name;
        this.age = age;
        this.gender = gender;
    }

    // getter and setter methods
}

public class User {
    private String name;
    private List<Friend> friends;

    public User(String name) {
        this.name = name;
        this.friends = new ArrayList<>();
    }

    public void addFriend(Friend friend) {
        friends.add(friend);
    }

    public void removeFriend(Friend friend) {
        friends.remove(friend);
    }

    public List<Friend> findFriendsByName(String name) {
        List<Friend> result = new ArrayList<>();
        for (Friend friend : friends) {
            if (friend.getName().equals(name)) {
                result.add(friend);
            }
        }
        return result;
    }

    // getter and setter methods
}