Code for the Parking Lot

Let's write the code for the classes that we have designed, in different languages in this lesson.

We’ve gone over the different aspects of the parking lot system and observed the attributes attached to the problem using various UML diagrams. Let’s explore the more practical side of things, where we will work on implementing the parking lot system 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 the parking lot system:

  • Java

  • C#

  • Python

  • C++

  • JavaScript

Parking lot classes

In this section, we will provide the skeleton code of the classes designed in the class diagram lesson.

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

Enumerations and custom data type

First of all, we will define all the enumerationsA special data type which contains a set of predefined constants. required in the parking lot. According to the class diagram, there are two enumerations used in the system i.e., PaymentStatus and AccountStatus. The code to implement these enumerations and custom data types is as follows:

Note: JavaScript does not support enumerations, so we will be using the Object.freeze() method as an alternative that freezes an object and prevents further modifications.

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