CSC160 Assignment 8 solved

Description

Assignment: Car Class Hierarchy

Implement a superclass and two subclasses to model cars, with specific requirements for constructors, methods, and testing.

1. Superclass Car

• Instance Variable:

  • price (derived from input cost).

• Constructor:

  • 1-parameter Car(double cost): Sets price = cost * 2.

• Method:

  • getPrice(): Accessor method returning price.

2. Subclass NewCar (extends Car)

• Additional Instance Variable:

  • color (e.g., “silver”).

• Constructor:

  • 2-parameter NewCar(double cost, String color): Calls superclass constructor and initializes color.

• Methods:

  • equals(NewCar other): Compares price and color for equality.

  • toString(): Returns formatted string (e.g., "price = $16,000.66, color = silver").

3. Subclass UsedCar (extends Car)

• Additional Instance Variable:

  • mileage (e.g., 100000).

• Constructor:

  • 2-parameter UsedCar(double cost, int mileage): Calls superclass constructor and initializes mileage.

• Methods:

  • equals(UsedCar other): Compares price and mileage for equality.

  • toString(): Returns formatted string (e.g., "price = $5,000.00, mileage = 100,000").

4. Driver Class (CarDemo)

• Main Method:

  public static void main(String[] args) {
      NewCar new1 = new NewCar(8000.33, "silver");
      NewCar new2 = new NewCar(8000.33, "silver");
      if (new1.equals(new2)) {
          System.out.println(new1);
      }
  
      UsedCar used1 = new UsedCar(2500, 100000);
      UsedCar used2 = new UsedCar(2500, 100000);
      if (used1.equals(used2)) {
          System.out.println(used1);
      }
  } // end main

• Expected Output:

  price = $16,000.66, color = silver
  price = $5,000.00, mileage = 100,000