Order of Products (using Read and Write from Text Files)

/* Read from a text file named "Products.txt" a list of product with prices
 * and keep them in a list of products.
 * Each product will be in format name + space + price.
 * You should hold the products in objects of class Product.
 * Read from a text file named "Order.txt" an order of products with quantities.
 * Each order line will be in format product + space + quantity.
 * Calculate and print in a text file "Output.txt" the total price of the order.
 * Ensure you close correctly all used resources. */

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintStream;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Scanner;

public class _10_OrderOfProducts {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        ArrayList<Product> productList = readInputProductFileAndCreateListOfProducts();
        if (productList.size() > 0) {
            ArrayList<String> orderList = readInputOrderFileAndCreateOrderList();
            BigDecimal totalPrice = calculateTotalPriceOfAllProductsInOrderList(
                    productList, orderList);
            printTheTotalPriceInTextFile(totalPrice);
        } else {
            System.out.println("Error! - The Products Price List is Empty!!!");
        }
    }

    private static ArrayList<Product> readInputProductFileAndCreateListOfProducts() {
        ArrayList<Product> products = new ArrayList<>();
        File file = new File("Products.txt");
        try (Scanner scan = new Scanner(file);) {
            while (scan.hasNextLine()) {
                String[] inputs = scan.nextLine().split("[ ]+");
                Product product = new Product(inputs[0], inputs[1]);
                products.add(product);
            }
        } catch (FileNotFoundException e) {
            System.out.println("Error! - The Product text File is Not Found!!!");
            e.printStackTrace();
        }

        return products;
    }

    private static ArrayList<String> readInputOrderFileAndCreateOrderList() {
        ArrayList<String> orders = new ArrayList<>();
        File file = new File("Order.txt");
        try (Scanner scan = new Scanner(file);) {
            while (scan.hasNextLine()) {
                String orderLine = scan.nextLine();
                orders.add(orderLine);
            }
        } catch (FileNotFoundException e) {
            System.out.println("Error! - The Order text File is Not Found!!!");
            e.printStackTrace();
        }

        return orders;
    }

    private static BigDecimal calculateTotalPriceOfAllProductsInOrderList(
            ArrayList<Product> products, ArrayList<String> orders) {
        BigDecimal result = BigDecimal.ZERO;
        if (orders.size() == 0) {
            System.out.println("The List of Orders is Empty!");
            return result;
        }

        for (String order : orders) {
            String[] splitted = order.split("[ ]+");
            BigDecimal quantity = new BigDecimal(splitted[0]);
            String orderName = splitted[1];
            for (Product product : products) {
                String productName = product.getName();
                if (productName.equals(orderName)) {
                    quantity = quantity.multiply(product.getPrice());
                    break;
                }
            }

            result = result.add(quantity);
        }

        return result;
    }

    private static void printTheTotalPriceInTextFile(BigDecimal price) {
        File file = new File("Output.txt");
        try (PrintStream writer = new PrintStream(file);) {
            writer.printf("The Total Price of the all Order products is: %.2f",
                    price);
        } catch (IOException e) {
            System.out.println("Error! - Has a Problem with Output text File!!!");
            e.printStackTrace();
        }
    }

}