Question

2. Consider a car manufacturer that assembles different trim levels of a car: i) Basic has all the basic features of a car ii Luxury - has everything the Basic version has plus luxury features, e.g. leather seats, high-fidelity sound system, etc. i) Ultimate has everything the Luxury version has plus state-of-the-art features, e.g. lane-following, turn-by-turn navigation, etc. Design a system that can easily assemble a car of any trim level that a user requires. Draw the Class diagram. There should be a method assemble) for the manufacturer to assemble cars of a particular trim. You are free to include any other methods in your class diagram. (a) (5 marks) Assume that all the classes in your diagram in Q2(a) above had been implemented. Write the Java code for the main) method to instantiate one instance of the Luxury trim, and one instance of the Ultimate trim. You may give your public class any name that you like. (b)

Answer 1

BasicCar CarColor: String 写CarName: String Assemble(): BasicCari D Interface ICar 육Assembe(): ICar LuxuryCar 弓LeatherCoverColor. String ESoundSystemBrand: String Assemble(): LuxuryCar UltimateCar LaneFollowngRule: String TurnByTurnNavigationPolicy. String Assemble(): UltimateCar

Class diagram for the given requirement has been attached, the implementation can be done using a factory pattern and so as to maintain the type safety.
Explanation:
ICar is an interface, which can be used for the implementation of the factory pattern, so as to maintain type safety.
BasicCar: This will contain all the basic attributes and the methods, the assemble method will give out the basic car.
LuxuryCar: It inherits the basic car to get the basic features of the car and calls the base assemble method to derive a basic car and then builds it up with special features to give a luxury car.
UltimateCar: It inherits the luxury car to get the luxury features of the car and calls the base assemble i.e., luxury car assemble method to derive a luxury car and then builds it up with special features to give a ultimate car.

B. Answer to instantiate the car

public static void main(String[] args)
{
ICar luxuryCar = new LuxuryCar();
luxuryCar.Assemble();
ICar ultimateCar = new UltimateCar();
ultimateCar();

}

As per my understanding, I have answered this, if there is much required and if you let me know your requirements, I can give you the better solution.