Class Diagram for Stack Overflow

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

Components of Stack Overflow

As mentioned earlier, we will design the Stack Overflow system using a bottom-up approach.

Guest

The Guest class is a user who can only search and view questions and their answers.

The visual representation of the Guest class is provided below:

Question

The Question class is used to enter the details of the question being asked by a user, such as its title, content, tags, etc. It can also allow users to add comments and bounties.

Here is what the class definition looks like:

Answer

The Answer class represents a user’s answer to a question and will contain elements like content, upvotes, and downvotes.

The UML representation of the class is shown below:

Comment

The Comment class refers to an opinion or remark provided by a user on either a question or an answer. It can only be upvoted and flagged, but not downvoted.

The UML representation of the class is shown below:

Bounty

The Bounty class refers to an award of granting reputation points on a question to attract more attention from other users. It will have an expiry date of seven days and must stay on for at least one day.

The class diagram of the Bounty class is shown below:

Badge

The Badge class refers to badges on a user’s profile that show a reputation-worthy user. ...