Find specific object in a List by attribute

Question

I have a list:

List userList = new ArrayList<>();

Where I add the following:

User father = new User()         


        

Answer 1

The obvious solution would be iterating on the list and when the condition is met, return the object:

for (User user : userList) {
    if ("peter".equals(user.getName()) {
        return user;
    }
}

And you can use filter (Java 8):

List l = list.stream()
    .filter(s -> "peter".equals(s.getUser()))
    .collect(Collectors.toList());

to get a list with all "peter" users.

As suggested in comments, I think using Map is a better option here.