java - Finding and showing element in arraylist -

is there easy way search through arraylist? see there many things collections removeall() , add() there searching through list

add method userarchive class loops through list , compares each user id 1 passed in.

public user findbyid(int id) {     (user u : list) {         if (u.getcustomerid() == id) {             return u;         }     }     return null; // or empty user }