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Class & Object Based Program - Electric Bill - Java Programs

Define a class ElectricBill with the following specifications:

Class name: ElectricBill
Instance variables/data members:
String n – to store the name of the customer
int units – to store the number of units consumed
double bill – to store the amount to be paid

Member functions:
void accept() – to accept the name of the customer and number of units consumed
void calculate() – to calculate the bill as per the following tariff:

Number of units	Rate per unit
First 100 units	₹ 2.00
Next 200 units	₹ 3.00
Above 300 units	₹ 5.00

A surcharge of 2.5% is charged if the number of units consumed is above 300 units.
void print() – to print the details as follows:

Name of the customer: …………….
Number of units consumed: …………….
Bill amount: …………….

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

Java


import java.util.Scanner;
class ElectricBill{
    String n;
    int units;
    double bill;
    public void accept(){
        Scanner in = new Scanner(System.in);
        System.out.print("Customer name: ");
        n = in.nextLine();
        System.out.print("Units consumed: ");
        units = Integer.parseInt(in.nextLine());
    }
    public void calculate(){
        if(units <= 100)
            bill = units * 2.0;
        else if(units <= 300)
            bill = 200 + (units - 100) * 3.0;
        else{
            bill = 800 + (units - 300) * 5.0;
            bill += 2.5 / 100 * bill;
        }
    }
    public void print(){
        System.out.println("Name of the customer: " + n);
        System.out.println("Number of units consumed: " + units);
        System.out.println("Bill amount: " + bill);
    }
    public static void main(String[] args){
        ElectricBill obj = new ElectricBill();
        obj.accept();
        obj.calculate();
        obj.print();
    }
}

Output

 
 OUTPUT 1: 
Customer name: Rocky
Units consumed: 125
Name of the customer: Rocky
Number of units consumed: 125
Bill amount: 275.0 

 OUTPUT 2: 
Customer name: Ronnie
Units consumed: 350
Name of the customer: Ronnie
Number of units consumed: 350
Bill amount: 1076.25