Question

Coding Java Assignment

1. Write the following static methods. Assume they are all in the same class. Assume the reference variable input for the Scanner class and any class-level variables mentioned are already declared. All other variables will have to be declared as local unless they are parameter variables. Use printf.

1. A method that prompts for the customer’s name and returns it from the keyboard.

2. A method called shippingInvoice() that prompts for an invoice number and stores it in a class variable (field) called invoiceNo. Assume the invoice number is a combination of numbers and text.

3. Overload the method coded in 1b above so that it accepts a customer’s name through its parameter list, concatenates the name and invoice number in a header and returns the header. This method will not prompt for the name or invoice number. The content of the header will look like this where the Xs represent the actual customer name and invoice number:

Customer Name: Xxxxxxxxxxxx

Invoice No: XXXXXXXX

4. A method that prompts for the subtotal and returns it from the keyboar

5. A method that prompts for the number of items purchased and returns it from the keyboard.

6. A method that accepts the noItemsPurchased and the subtotal through its parameter list and returns an average dollar amount of the items purchased. No prompts are needed.

7. A method that accepts what is returned by the methods coded in 1c and 1f to print the following:

Customer Name: Xxxxxxxxxxxx

Invoice No: XXXXXXXX

Average of Items Purchased: $ZZZ,ZZ9.99

2. Write statements that will call each of the methods you coded above. Be conscious of the value-returning methods. Assume the method calls are done in the main() and the main() is in the same class.

a.

b.

c.

d.

e.

f.

Answer 1

1).ANSWER:

GIVEN BELOW:

import java.util.Scanner;

public class CustomerShopping {
Scanner sc=new Scanner(System.in);
String customerName;
String InvoiceNo;
int noItemsPurchased;
double subTotal;
// A method that prompts for the customer’s name and returns it from the keyboard.
public String setCustomerName() {
System.out.print("Enter customer Name :");
this.customerName = sc.nextLine();
return this.customerName;
}
// A method called shippingInvoice() that prompts for an invoice number and stores it in a class variable (field) called invoiceNo. Assume the invoice number is a combination of numbers and text.
public String shippingInvoice() {
System.out.print("Enter Invoice Number :");
this.InvoiceNo = sc.nextLine();
return this.InvoiceNo;
}
// Overload the method coded in 1b above so that it accepts a customer’s name through its parameter list, concatenates the name and invoice number in a header and returns the header. This method will not prompt for the name or invoice number. The content of the header will look like this where the Xs represent the actual customer name and invoice number:
public String CombineNameInvoice(String customerName){
String combinedCode = customerName+this.InvoiceNo;
return combinedCode;
}
// A method that prompts for the number of items purchased and returns it from the keyboard.
public int setNoItemsPurchased() {
System.out.print("Enter No of items purchased :");
this.noItemsPurchased = sc.nextInt();
return this.noItemsPurchased;
}
// A method that prompts for the subtotal and returns it from the keyboar
public double setSubTotal() {
System.out.print("Enter Sub Total :");
this.subTotal = sc.nextInt();
return this.subTotal;
}
// A method that accepts the noItemsPurchased and the subtotal through its parameter list and returns an average dollar amount of the items purchased. No prompts are needed.
public double calculateAverage(int noItemsPurchased,double subTotal){
return (double)subTotal/noItemsPurchased;
}
// A method that accepts what is returned by the methods coded in 1c and 1f to print the following:
public void displayBill(String combinedName,double average){
System.out.println("Customer Name: "+combinedName);
System.out.println("Invoice No: "+InvoiceNo);
System.out.println("Average of Items Purchased: "+average);
}

public static void main(String[] args) {
CustomerShopping customer =new CustomerShopping();
String customerName=customer.setCustomerName();
String InvoiceNo=customer.shippingInvoice();
int noItemsPurchased = customer.setNoItemsPurchased();
double subTotal=customer.setSubTotal();
String CombineNameInvoice = customer.CombineNameInvoice(customerName);
double average = customer.calculateAverage(noItemsPurchased, subTotal);
customer.displayBill(CombineNameInvoice, average);
  
}
}