Object-Oriented Programming In Java – CarYardMIT162011

Package caryard

Task 2: Car Class

package caryard;

public class Car {

       int id;

       String modelName;

       int year;

       double costPrice, sellingPrice;

       Car(String name, int year, double costPrice){

              setID();

              this.modelName = name;

              this.year = year;

              this.costPrice = costPrice;

              sellingPrice = calcSP();       }

       public void setID(){

              id = (int) ((Math.random() * ((1000 – 100) + 1)) + 100);

       }

       int getID(){

              return id;

       }

       String getModel(){

              return modelName;

       }

       int getYear(){

              return year;

       }

       double getCP(){

              return costPrice;

       }

       double getSP(){

              return sellingPrice;

       }

       double calcSP(){

              return costPrice*(1 + 0.3);

       }

}

Task 3: Driver Class

package caryard;

import java.util.Scanner;

public class CarYardMIT162011 {

       static Car[] cars = new Car[100];

       static int carCount=0;

       static Scanner sc = new Scanner(System.in);     

       private static void buy(){

              System.out.println(“n~ Buy Car ~”);

              System.out.println(“nEnter model name:”);

              String name = sc.nextLine();

              int year;

              while(true){

                     System.out.println(“Enter year:”);

                     year = sc.nextInt();

                     if(year<2009)

                           System.out.println(“nError! The car yard does not buy cars manufactured before 2009.”);

                     else

                           break;              }

              System.out.println(“Enter price: $”);

              double price = sc.nextDouble();

              cars[carCount]=new Car(name,year,price);

              System.out.println(“nNew car added: “+name+” (“+year+”)”);

              carCount++;

       }     

       private static void display(){

              System.out.println(“n~ Car List ~”);

              for(int i=0;i<carCount;i++){

                     System.out.println(“n”+(i+1)+”:”);

                     System.out.println(“ntCar ID: “+cars[i].getID());

                     System.out.println(“ntModel: “+cars[i].getModel());

                     System.out.println(“ntYear: “+cars[i].getYear());

                     System.out.println(“ntCost price: $”+cars[i].getCP());

                     System.out.println(“ntSelling price: $”+cars[i].getSP());

                     System.out.println();    

       private static int sell(){

              System.out.println(“n~ Sell Car ~”);

              System.out.println(“nEnter car ID:”);

              int id = sc.nextInt();

              for(int i=0;i<carCount;i++){

                     if(cars[i].getID()==id){

                           System.out.println(“ntModel: “+cars[i].getModel());

                           System.out.println(“ntYear: “+cars[i].getYear());

                           System.out.println(“ntCost price: $”+cars[i].getCP());

                           System.out.println(“ntSelling price: $”+cars[i].getSP());

                           return 1;

              System.out.println(“No match found for car ID: “+id);

              return 0;      

       public static void main(String[] args){

              int choice=1;

              cars[carCount]=new Car(“Mazda”,2009,15000);

              carCount++;

              cars[carCount]=new Car(“Suzuki”,2018,7000);

              carCount++;

              cars[carCount]=new Car(“Royce”,2015,12000);

              carCount++;

              while(choice!=4){

                     System.out.println(“n~ Main Menu ~”);

                     System.out.print(“1. Buy Carn2. Sell Carn3. Display all carsn4. ExitnnEnter menu choice… “);

                     choice = sc.nextInt();

                     sc.nextLine();

                     switch(choice){

                     case 1: buy();

                           break;

                     case 2: sell();

                           break;

                     case 3: display();

                           break;

                     case 4:

                           System.out.println(“nGoodbye! Have a nice day!”);

                           break;

                     default: System.out.println(“Wrong entry!”);

Output

~ Main Menu ~

1. Buy Car
2. Sell Car
3. Display all cars
4. Exit

Enter menu choice… 1~ Buy Car ~

Enter model name:

Ferrari

Enter year:

2016

Enter price: $

25000

New car added: Ferrari (2016)

~ Main Menu ~

1. Buy Car
2. Sell Car
3. Display all cars
4. Exit

Enter menu choice… 3~ Car List ~1:

       Car ID: 719

       Model: Mazda

       Year: 2009

       Cost price: $15000.0

       Selling price: $19500.0

2:

       Car ID: 393

       Model: Suzuki

       Year: 2018

       Cost price: $7000.0

       Selling price: $9100.0

3:       Car ID: 620

       Model: Royce

       Year: 2015

       Cost price: $12000.0

       Selling price: $15600.0

4:       Car ID: 671

       Model: Ferrari

       Year: 2016

       Cost price: $25000.0

       Selling price: $32500.0

~ Main Menu ~

1. Buy Car
2. Sell Car
3. Display all cars
4. Exit

Enter menu choice… 5

Wrong entry!

~ Main Menu ~

1. Buy Car
2. Sell Car
3. Display all cars
4. Exit
5. Enter menu choice… 2

~ Sell Car ~

Enter car ID:

323

No match found for car ID: 323

~ Main Menu ~

1. Buy Car
2. Sell Car
3. Display all cars
4. Exit

Enter menu choice… 2

~ Sell Car ~

Enter car ID:

393

       Model: Suzuki

       Year: 2018

       Cost price: $7000.0

       Selling price: $9100.0

~ Main Menu ~

1. Buy Car
2. Sell Car
3. Display all cars
4. Exit

Enter menu choice… 4

Goodbye! Have a nice day!