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Java Programs - Solved 2019 ICSE Computer Science Paper

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Class & Object Based Program - Java Programs

Design a class ShowRoom with the following description:

Instance variables/data members:
String name – to store the name of the customer
long mobNo – to store the mobile number of the customer
double cost – to store the cost of the items purchased
double dis – to store the discount amount
double amount – to store the amount to be paid after discount

Member methods:
ShowRoom() – default constructor to initialize data members
void input() – to input customer name, mobile number, cost
void calculate() – to calculate discount on the cost of purchased items, based on the following criteria:

Cost

Discount (in percentage)

Less than or equal to ₹ 10000

5%

More than ₹ 10000 and less than or equal to ₹ 20000

10%

More than ₹ 20000 and less than or equal to ₹ 35000

15%

More than ₹ 35000

20%

void display() – to display customer name, mobile number, amount to be paid after discount


Write a main() method to create an object of the class and call the above member methods.

Java 

import java.util.Scanner;
class ShowRoom{
    String name;
    long mobNo;
    double cost;
    double dis;
    double amount;
    public ShowRoom(){
        name = "";
        mobNo = 0L;
        cost = 0.0;
        dis = 0.0;
        amount = 0.0;
    }
    public void input(){
        Scanner in = new Scanner(System.in);
        System.out.print("Name: ");
        name = in.nextLine();
        System.out.print("Mobile number: ");
        mobNo = Long.parseLong(in.nextLine());
        System.out.print("Cost of items: ");
        cost = Double.parseDouble(in.nextLine());
    }
    public void calculate(){
        if(cost <= 10000)
            dis = 5.0;
        else if(cost <= 20000)
            dis = 10.0;
        else if(cost <= 35000)
            dis = 15.0;
        else
            dis = 20.0;
        dis = dis / 100 * cost;
        amount = cost - dis;
    }
    public void display(){
        System.out.println("Name: " + name);
        System.out.println("Mobile number: " + mobNo);
        System.out.println("Amount: " + amount);
    }
    public static void main(String[] args){
        ShowRoom obj = new ShowRoom();
        obj.input();
        obj.calculate();
        obj.display();
    }
}

Output

 
 OUTPUT 1: 
Name: Anand Rao
Mobile number: 1234567890
Cost of items: 12000

Name: Anand Rao
Mobile number: 1234567890
Amount: 10800.0 

 OUTPUT 2: 
Name: Ajay Singh
Mobile number: 9087654321
Cost of items: 21000

Name: Ajay Singh
Mobile number: 9087654321
Amount: 17850.0
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