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Code for Facebook

Discover how to implement the Facebook system using object-oriented design concepts and principles. Learn to write skeleton code for key classes and interfaces across multiple programming languages, understand user interactions, profile management, groups, pages, messages, and notifications. This lesson helps you integrate UML design with practical code to simulate real-world social network features.

We’ve reviewed different aspects of Facebook and observed the attributes attached to the problem using various UML diagrams. Let’s now explore the more practical side of things, where we will work on implementing the Facebook network using multiple languages. This is usually the last step in an object-oriented design interview process.

We have chosen the following languages to write the skeleton code of the different classes present in Facebook:

  • Java

  • C#

  • Python

  • C++

  • JavaScript

If you want to skip directly to the implementation and see the complete workflow, simply scroll down or click Executable Code: Designing Facebook.

Facebook classes

This section will provide the skeleton code of the classes designed in the class diagram lesson.

Note: For simplicity, we are not defining getter and setter functions. The reader can assume that all class attributes are private, accessed through their respective public getter methods, and modified only through their public method functions.

Constants

The following code defines the ...