SWENG$311/$CMPSC$221$ Object$-$Oriented Design

Lab $6$: Abstract Classes and Polymorphism

Objectives:

Practice programming using Object Oriented design using Abstract classes and polymorphic design.

Instructions:

You are allowed to use IDE to solve this lab.

Write a Java program that solves the following problem, this is a Re$-$Design from Lab$5$ where you will need to follow the correct object$-$oriented design principles.

Answer the following questions as part of your pseudocode section.

a$)$ Use Abstract Classes and Methods in your design.

i$)$ Which Classes you will convert to abstract$?$

ii$)$ Which methods if any should be abstract from that class?

b$)$ Utilize Polymorphic Design Principles.

i$)$ Which parts and what changes would you make to utilize polymorphic design principles?

Requirements:

All your classes$/$code Must be written in a single file called $$Lab$6.$java$.$

In the main function,

Main function: Demo your code with

$6$ Car Objects. $2$ Objects from each car type.

One Dealership car Object.

Utilize all dealership methods.

$($Except the getters and setters, you are free to use or not. Whatever way you see fit$).$

The following are the technical requirements for each class you will develop.

Dealership:

Must have at least one constructor.

A method to update$/$change each attribute in the class.

ONE method to count the number for each car type $-($Electric$,$ Gas and Diesel$)-$in the dealership lot.