Question

write in java and you must use methods....

Part I     Internet Service Provider

An Internet service provider has three different subscription packages for its customers:

Package A: For $9.95 per month 10 hours of access are provided. Additional hours

are $2.00 per hour.

Package B: For $13.95 per month 20 hours of access are provided. Additional hours

are $1.00 per hour.

Package C: For $19.95 per month unlimited access is provided.

Write a program that calculates a customer’s monthly bill. It should ask the user to enter

the letter of the package the customer has purchased (A, B, or C) and the number of hours

that were used. It should then display the total charges.

Part 2   Internet Service Provider

Modify the program you wrote for Programming in part 1 so it also calculates and

displays the amount of money Package A customers would save if they purchased Package

B or C, and the amount of money Package B customers would save if they purchased Package If there would be no savings, no message should be printed.

Answer 1

Below is the complete code as per the requirements. It is well explained inside the code using comments.

import java.util.Scanner;

// InternetServiceProvider class
public class InternetServiceProvider {

    // main method
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);     // to read the input
        char pack;                                  // to store letter of package
        int hours;                                  // to store number of hours
        double totalCharges;                        // to store total charges
        double savings;                             // to store savings

        // display package details
        displayPackage();

        // read package letter and nunber of hours
        System.out.print("Enter the letter of package [A/B/C]: ");
        pack = input.nextLine().charAt(0);
        System.out.print("Enter the number of hours: ");
        hours = input.nextInt();

        // call method to calculate total charges
        totalCharges = getTotalCharges(pack, hours);

        // display the total charges
        System.out.println("Total charges: $" + totalCharges);

        // check for savings, display message if any
        if (pack == 'A') {
            if (totalCharges > 13.95) {
                savings = totalCharges - 13.95;
                System.out.println("If you purchase package B, you would save $" + savings);
            }
            else if (totalCharges > 19.95) {
                savings = totalCharges - 19.95;
                System.out.println("If you purchase package C, you would save $" + savings);
            }
        }
        else if (pack == 'B') {
            if (totalCharges > 19.95) {
                savings = totalCharges - 19.95;
                System.out.println("If you purchase package C, you would save $" + savings);
            }
        }
    }

    // displays package details
    private static void displayPackage() {
        System.out.println("Package A: For $9.95 per month - 10 hours of access. Additional hours are $2.00 per hour.");
        System.out.println("Package B: For $13.95 per month - 20 hours of access. Additional hours are $1.00 per hour.");
        System.out.println("Package C: For $19.95 per month - unlimited access");
    }

    // calculates and return the total charges
    private static double getTotalCharges(char pack, int hours) {
        double total = 0;
        int extraHours = 0;

        // calculate total charges on the basis of pack and hours
        switch (pack) {
            case 'A':
                if (hours > 10) {
                    extraHours = hours - 10;
                }
                total = 9.95 + (2 * extraHours);
                break;
            case 'B':
                if (hours > 20) {
                    extraHours = hours - 20;
                }
                total = 13.95 + extraHours;
                break;
            case 'C':
                total = 19.95;
                break;
            default:
                System.out.println("Invalid Package.");
        }
        return total;
    }
}

Below are the sample outputs:

This completes the requirement. Let me know if you have any queries.

Thanks!