OOPS-lab-codes/MyOwnAutoShop.java

import java.util.Scanner;

// ---------- SUPER CLASS ----------
class Car {

    int speed;
    double regularPrice;
    String color;

    Car(int speed, double regularPrice, String color) {
        this.speed = speed;
        this.regularPrice = regularPrice;
        this.color = color;
    }

    double getSalePrice() {
        return regularPrice;
    }
}

// ---------- SUB CLASS : TRUCK ----------
class Truck extends Car {

    int weight;

    Truck(int speed, double regularPrice, String color, int weight) {
        super(speed, regularPrice, color);
        this.weight = weight;
    }

    double getSalePrice() {
        if (weight > 2000) return regularPrice * 0.90;
        // 10% discount
        else return regularPrice * 0.80; // 20% discount
    }
}

// ---------- SUB CLASS : FORD ----------
class Ford extends Car {

    int year;
    int manufacturerDiscount;

    Ford(
        int speed,
        double regularPrice,
        String color,
        int year,
        int manufacturerDiscount
    ) {
        super(speed, regularPrice, color);
        this.year = year;
        this.manufacturerDiscount = manufacturerDiscount;
    }

    double getSalePrice() {
        return super.getSalePrice() - manufacturerDiscount;
    }
}

// ---------- SUB CLASS : SEDAN ----------
class Sedan extends Car {

    int length;

    Sedan(int speed, double regularPrice, String color, int length) {
        super(speed, regularPrice, color);
        this.length = length;
    }

    double getSalePrice() {
        if (length > 20) return regularPrice * 0.95;
        // 5% discount
        else return regularPrice * 0.90; // 10% discount
    }
}

// ---------- MAIN CLASS ----------
public class MyOwnAutoShop {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        // ---- Sedan Object ----
        System.out.println("Enter Sedan details:");
        System.out.print("Speed: ");
        int sSpeed = sc.nextInt();
        System.out.print("Regular Price: ");
        double sPrice = sc.nextDouble();
        sc.nextLine();
        System.out.print("Color: ");
        String sColor = sc.nextLine();
        System.out.print("Length: ");
        int sLength = sc.nextInt();

        Sedan sedan = new Sedan(sSpeed, sPrice, sColor, sLength);

        // ---- Ford Object ----
        System.out.println("\nEnter Ford details:");
        System.out.print("Speed: ");
        int fSpeed = sc.nextInt();
        System.out.print("Regular Price: ");
        double fPrice = sc.nextDouble();
        sc.nextLine();
        System.out.print("Color: ");
        String fColor = sc.nextLine();
        System.out.print("Year: ");
        int fYear = sc.nextInt();
        System.out.print("Manufacturer Discount: ");
        int fDiscount = sc.nextInt();

        Ford ford = new Ford(fSpeed, fPrice, fColor, fYear, fDiscount);

        // ---- Car Object ----
        System.out.println("\nEnter Car details:");
        System.out.print("Speed: ");
        int cSpeed = sc.nextInt();
        System.out.print("Regular Price: ");
        double cPrice = sc.nextDouble();
        sc.nextLine();
        System.out.print("Color: ");
        String cColor = sc.nextLine();

        Car car = new Car(cSpeed, cPrice, cColor);

        // ---- Display Sale Prices ----
        System.out.println("\n--- Sale Prices ---");
        System.out.println("Sedan Sale Price: " + sedan.getSalePrice());
        System.out.println("Ford Sale Price: " + ford.getSalePrice());
        System.out.println("Car Sale Price: " + car.getSalePrice());

        sc.close();
    }
}