Class Diagram for Facebook

In this lesson, we’ll identify and design the classes, abstract classes, and interfaces based on the requirements we previously gathered from the interviewer in our Facebook social network system.

Components of Facebook

As mentioned, we will design the Facebook social network using a bottom-up approach.

Person

The Person class contains details like name, address, phone number, and email derived from the User class.

User

The User class is Facebook’s main class and is responsible for various operations, such as sending messages or friend requests to other users, creating or joining groups or pages, and numerous others.

The class diagram of these two classes is provided below:

Note: The User class contains various methods representing user interactions and functionalities within the system. For brevity, only a subset of these methods is shown here.