Initialization of List in a JSF Managed bean

Question

I\' have a question about initialization of List in the POJO as it follows the next code:

public class Person {

 //other fields...
 private List

        

Answer 1

I would suggest this:

public class Person {
     //other fields...
     private List friends=new ArrayList<>();

     // returns a copy to protect original list
     public List getFriends() {
        Collections.unmodifiableList(new ArrayList<>(friends));
     }
     public void addFriend(String> friend) {
        this.friends.add(friend);
     }
     public void addFriends(List friends) {
        this.friends.addAll(friends);
     }
}