Write each of these methods in the Unit6ProblemSet.java class. 1. Write a method

Question

Write each of these methods in the Unit6ProblemSet.java class.

1. Write a method called bannerPrinter that takes no parameter and has no return value. bannerPrinter outputs a greeting to the command line as shown below. ******************************************

****** Welcome to my eCommerce app! ******

******************************************

(print a blank line after the banner, all * must line up at the end)

2. Write a method called productBuilder that takes no parameters and returns an array of Strings. In the method body construct and return an array of 5 Strings (call the array products) and populate the array with 5 product names. You don't need to get the values from the user, just populate with 5 product names.

3. Write a method called getOrder that takes an array of Strings as a parameter (the products array) and returns a boolean. In the method body, prompt the user to enter a product name (a String), then check whether the product name exists in the array of strings. If it exists, return true, otherwise return false.

4. Write a method called getPrice that returns a double. In the method body generate a random number between 1 and 100. Use Math.random() multiplied by a scaling factor and return this value as the price.

5. Write a method called getTax that takes a double as a parameter (the price) and returns a double. Compute the return value as 10% of the parameter value (i.e. 10% of the price). This is the tax.

6. Write a method called getTotal that takes two doubles as parameters (the price and the tax) and returns a double. The return value is computed as the sum of the two parameters. The return value is the sale total.

7. Write a method called printTotal that takes a double as a parameter (the sale total) and has no return value. This method outputs the following to the command line: "Your sale total is: $X" where X is the sale total parameter value.

8. Call each of the methods above from the main method. The pseudocode for the main method will be as given below.

Print the banner message

Get the product array

Get the product order from the user and check it exists in the product array

If the product exists

       Get the product price

       Compute the product tax

       Compute the total sale

       Output the total sale

Else

       Output "Product not found."

Explanation / Answer

import java.util.Scanner;

/*
@author SRINIVAS PALLI
*/
public class Unit6ProblemSet {
   public static void main(String args[]) {
       bannerPrinter();
       String[] productEntry = productBuilder();
       boolean productRef = getOrder(productEntry);
       if (productRef) {
           double priceGen = getPrice();
           double taxGen = getTax(priceGen);
           double totalAmt = getTotal(priceGen, taxGen);
           System.out.println("Total Sale Price: $"
                   + String.format("%.2f", totalAmt));
       } else {
           System.out.println("Product not found.");
       }
   }

   // banner message
   public static void bannerPrinter() {
       System.out.println("******************************************");
       System.out.println("****** Welcome to my eCommerce app! ******");
       System.out.println("******************************************");
       System.out.println(); // instructions requested blank line after banner
   }

   // array of 5 predefined strings, not from user entry
   public static String[] productBuilder() {
       String[] products = new String[5];
       products[0] = "PS4";
       products[1] = "XBOX One";
       products[2] = "iPhone 6";
       products[3] = "Macbook";
       products[4] = "Surface Pro";

       return products;
   }

   // getOrder method
   public static boolean getOrder(String[] products) {
       String productEntry = "";
       Scanner scnr = new Scanner(System.in);
       System.out.println("Enter a product name Human: ");
       productEntry = scnr.nextLine();
       for (int i = 0; i < products.length; i++) {
           if (productEntry.equals(products[i])) {
               scnr.close();
               return true;
           }
       }
       scnr.close();
       return false;
   }

   // get Price method
   public static double getPrice() {
       double priceGen = Math.random() * 100.0 + 1.0;
       return priceGen;
   }

   // getTax Method
   public static double getTax(double priceGen) {
       return (priceGen * 0.10);
   }

   // getTotal Method
   public static double getTotal(double priceGen, double taxGen) {
       double totalAmt = priceGen + taxGen;
       return totalAmt;
   }

   // printTotal Method
   public static void printTotal(double totalAmt) {
       System.out.println("Your sale total is: $" + totalAmt);
   }
}

OUTPUT 1:
******************************************
****** Welcome to my eCommerce app! ******
******************************************

Enter a product name Human:
Box
Product not found.

OUTPUT 2:
******************************************
****** Welcome to my eCommerce app! ******
******************************************

Enter a product name Human:
PS4
Total Sale Price: $76.62

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