Class Diagram for the Car Rental System

Now, we’ll create the class diagram for the car rental system on the basis of the given requirements. In the class diagram, we will first identify classes (concrete, abstract, or associated) and interfaces for the system. Then, we will determine the relationship between them, according to the requirements in the previous lesson.

Components of a car rental system

As mentioned earlier, we’ll design the car rental system using a bottom-up approach.

Address and person

The Address class is a reusable value object that represents a physical address within the car rental system. This class standardizes the way addresses are stored and referenced for customers, staff, and branches. It contains attributes such as street address, city, state/province, postal/zip code, and country.

The Person class is an abstract base class that encapsulates common personal information for all individuals in the system, including customers, receptionists, and workers. This class centralizes attributes and methods shared by all people in the system, promoting code reuse and maintainability. The class representation of Address and Person is given below:

No change in the class representation of these classes.