Search an ArrayList for a particular Object

Question

I have a class called Person. It has the following attributes; It has 2 attributes, ID, and Telephone. 1 person can have many

Answer 1

i tried personList.contains()

Make sure you override Object.equals() and Object.hashCode() for Person class. But you have to have equality check on telephone number assuming telephone number unique. This would not be a solution but a workaround. Use bellum's answer. Mark it as correct answer.