The LineItemApp class

import java.util.Scanner;

public class LineItemApp
{
      public static void main(String args[])
      {
            // display a welcome message
            System.out.println("Welcome to the Line Calculator");
            System.out.println();
            
            // create 1 or more line item
            Scanner sc = new Scanner(System.in);
            String choice = "y";
            while (choice.equalsIgnoreCase("y"))
            {
                   // get the inpute from the user
                   String productCode = Validator.getString(sc, "Enter product code: ");
                   int quantity = Validator.getInt(sc, "Enter quantity: ", 0, 1000);
                   
                   // get the Product object
                   Product product = ProductDB.getProduct(productCode);
                   
                   // create the LineItem object
                   LineItem lineitem = new LineItem(product, quantity);

                   // display the output
                   System.out.println();
                   System.out.println("Line ITEM");
                   System.out.println("Code:        " + product.getCode());
                   System.out.println("Description: " + product.getDescription());
                   System.out.println("Price:       " + product.getFormattedPrice());
                   System.out.println("Quantity:    " + product.getQuantity());
                   System.out.println("Total:       " + product.getFormattedTotal() + "\n");

                   // see if the user wants to continue
                   choice = Validator.getString(sc, "Continue? (y/n): ");
                   System.out.println();

            }
      }
}

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