Enterprise application architecture

[Neo10101]

I took a look at someone's code here and I am trying to understand its architecture: We are looking at a classic enterprise architecture using Spring core for dependency injection.

import org.springframework.beans.factory.annotation.Autowired;

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

public class FavoriteService {
@Autowired
private Users users;

public boolean checkLogin(String username, String password) {
    return users.login(username, password);
}


public void addUser(String root, String rootpasswd, String username, String password) {
    if(root.equals("root")&&rootpasswd.equals("rootpasswd")) {
        users.addUser(username, password);
    }
}

public User getUser(String username){
    return users.getUser(username);
}

public List<String> getFavorites(String username, String password) {
    if (getUser(username) == null) return new ArrayList<>();
}

public void addFavorite(String username, String password, String favorite1) {
        users.addFavorite(username,password,favorite1);
}

public void removeFavorite(String username, String password, String favorite1) {
    users.removeFavorite(username,password,favorite1);
}

public void addFavorite(String username, String password, String favorite1) {

}

}

import java.util.ArrayList;
import java.util.List;

public class User {
private final String username;
private final String password;
private final List favorites = new ArrayList<String>();

public User(String username, String password) {
    this.username = username;
    this.password = password;
}

public String getPassword() {
    return password;
}

public String getUsername() {
    return username;
}

public List<String> getFavorites(){
    return favorites;
}

public void addFavorite(String favorite){
    favorites.add(favorite);
}

public void removeFavorite(String favorite) {
    favorites.remove(favorite);
}

}

public interface UserDao {
public void create(User user);

public User getUser(String username);

}

import java.util.HashMap;
import java.util.Map;

public class UserDaoWithMap implements UserDao {

[Lost User]

Neo10101 wrote:

I took a look at someone's code here

Then you should direct your question to that person.

[Neo10101]

There is no need to give me replies like that to every question I ask. My colleague is on vacation.