Question

[IN JAVA]

Finish the program. There are instructions in the comments.
You may want to comment out the function calls in main, and get one function to work at a time.
Thanks in advance!

Template

import java.util.Scanner;

public class Main{

    public static Scanner kb = new Scanner(System.in);

    public static void main(String [] args) {

        String productName;
        double productPrice;
        int productQuantity;
        double shipping;
        int quantityDiscount;
        double finalTotal;

        productName = queryName();
        productPrice = queryPrice(); 
        productQuantity = queryQuantity();

        System.out.println();

        quantityDiscount = computeQuantityDiscount(productQuantity);

        shipping = computeShippingCost(productQuantity, productPrice);

        finalTotal = computeFinalTotal(productPrice, productQuantity, quantityDiscount, shipping);

        printFinalInvoice(productName, productQuantity, productPrice, quantityDiscount, shipping, finalTotal);

        System.out.println();

        printStringBackward(productName);

    }

    // Write a method that asks the user to enter an item and returns it.


    // Write a method that asks the user to enter a price and returns it.


    // Write a method that asks the user to enter a quantity and returns it.



    // Write a method to compute the quantity discount. They get a 15% discount for 50 or more items, 
    // a 5% discount for 10 - 49 items, and no discount for less than 10 items. 
    // The method returns the discount as an integer



    // Write a method that computes the shipping cost. It is $1.99 
    // if they spent $50.00 or more before discounts, otherwise
    // it is $6.99. The shipping cost is returned.


    // Write a method called computeFinalTotal(). It takes in the cost of the item, 
    // the quantity of the item, the discount for the order, and the 
    // shipping cost for the order. It returns the order total.


    // Write a method that prints the final invoice. It should take in 
    // the item name, quantity, cost of the item, the discount for the order, 
    // and the shipping cost. It returns nothing to the user.



    //Write a method that takes in a string and prints it backwards. The method ends with a new line.

Output #1

Enter product: Grapes
Enter price: 1.59
Enter quantity: 22

Order Summary
Item: Grapes
Quantity: 22
You are receiving a 5% quantity discount.
Your shipping cost is $6.99

Total with shipping and discounts: $40.22

separG

Output #2

Enter product: Grapes 
Enter price: 1.59
Enter quantity: 7

Order Summary
Item: Grapes
Quantity: 7
You are receiving a 0% quantity discount.
Your shipping cost is $6.99

Total with shipping and discounts: $18.12

separG

Output #3

Enter product: Grapes 
Enter price: 1.59
Enter quantity: 220

Order Summary
Item: Grapes
Quantity: 220
You are receiving a 15% quantity discount.
Your shipping cost is $1.99

Total with shipping and discounts: $299.32

separG

Answer 1

SOLUTION: Following will be the required code in java for the same:

OUTPUT:

#1

#2

#3

CODE:

import java.util.Scanner;

public class Main{

public static Scanner kb = new Scanner(System.in);

public static void main(String [] args) {

String productName;
double productPrice;
int productQuantity;
double shipping;
int quantityDiscount;
double finalTotal;

productName = queryName();
productPrice = queryPrice();
productQuantity = queryQuantity();

System.out.println();

quantityDiscount = computeQuantityDiscount(productQuantity);

shipping = computeShippingCost(productQuantity, productPrice);

finalTotal = computeFinalTotal(productPrice, productQuantity, quantityDiscount, shipping);

printFinalInvoice(productName, productQuantity, productPrice, quantityDiscount, shipping, finalTotal);

System.out.println();

printStringBackward(productName);

}

// Method that asks the user to enter an item and returns it.

public static String queryName(){

   System.out.print("Enter product: ");
   return kb.next();
}

// Method that asks the user to enter a price and returns it.

public static double queryPrice(){

   System.out.print("Enter price: ");
   return kb.nextDouble();
}
// Method that asks the user to enter a quantity and returns it.

public static int queryQuantity(){

   System.out.print("Enter quantity: ");
   return kb.nextInt();
}

// Method to compute the quantity discount. They get a 15% discount for 50 or more items,
// a 5% discount for 10 - 49 items, and no discount for less than 10 items.
// The method returns the discount as an integer

public static int computeQuantityDiscount(int productQuantity){

   if(productQuantity >= 50){
       return 15;
   }
   else if(productQuantity >= 10){
       return 5;
   }
   else{
       return 0;
   }
}

// Method that computes the shipping cost. It is $1.99
// if they spent $50.00 or more before discounts, otherwise
// it is $6.99. The shipping cost is returned.

   public static double computeShippingCost(int productQuantity, double productPrice){

   double totalExpenditure = productQuantity * productPrice;
   if(totalExpenditure >= 50){
       return 1.99;
   }
   else{
       return 6.99;
   }
}

//Method called computeFinalTotal(). It takes in the cost of the item,
// the quantity of the item, the discount for the order, and the
// shipping cost for the order. It returns the order total.

   public static double computeFinalTotal(double productPrice, int productQuantity, int quantityDiscount, double shipping){

   double finalTotal = productQuantity * productPrice - (quantityDiscount * (productQuantity * productPrice)) / 100 + shipping;
   return finalTotal;
}
// Method that prints the final invoice. It should take in
// the item name, quantity, cost of the item, the discount for the order,
// and the shipping cost. It returns nothing to the user.
public static void printFinalInvoice(String productName, int productQuantity, double productPrice,
                                                                           int quantityDiscount, double shipping, double finalTotal){

    System.out.println("Order Summary");
    System.out.println("Item: " + productName);
    System.out.println("Quantity: " + productQuantity);
    System.out.println("You are receiving a " + quantityDiscount + "% quantity discount.");
    System.out.println("Your shipping cost is $" + shipping);
    System.out.println();
    System.out.println("Total with shipping and discounts: $" + String.format("%.2f", finalTotal));

}

// Method that takes in a string and prints it backwards. The method ends with a new line.
public static void printStringBackward(String productName){

    for(int i = productName.length() - 1; i >= 0; i--){
        System.out.print(productName.charAt(i));
    }
}
}

EXPLANATION:

Simple java syntax is followed. Instructions as per given in the comments were implemented.

The java string format() method returns a formatted string using the given locale, specified format string and arguments.We can concatenate the strings using this method and at the same time, we can format the output concatenated string