Vending Machine

import java.util.Scanner;

public class EP07VendingMachine {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        double totalCoinsInserted = 0;
        double productsTotalPrice = 0;

        double nuts = 2.0;
        double water = 0.7;
        double crisps = 1.5;
        double soda = 0.8;
        double coke = 1.0;


        while (true) {

            String command = scanner.nextLine();

            if (command.equalsIgnoreCase("start")) {
                break;
            }
            double insertedCoins = Double.parseDouble(command);

            if (insertedCoins != 0.1 && insertedCoins != 0.2
                    && insertedCoins != 0.5 && insertedCoins != 1
                    && insertedCoins != 2) {
                System.out.printf("Cannot accept %.2f\n", insertedCoins);
            } else {
                totalCoinsInserted += insertedCoins;
            }
        }

        while (true) {
            String productType = scanner.nextLine();

            if (productType.equalsIgnoreCase("End")) {
                System.out.printf("Change: %.2f", totalCoinsInserted - productsTotalPrice);
                break;
            }

            switch (productType) {
                case "Nuts":
                    productsTotalPrice += nuts;

                    if (productsTotalPrice > totalCoinsInserted) {
                        productsTotalPrice -= nuts;
                        System.out.println("Sorry, not enough money");
                    } else {
                        System.out.printf("Purchased %s\n", productType);
                    }
                    break;
                case "Water":
                    productsTotalPrice += water;

                    if (productsTotalPrice > totalCoinsInserted) {
                        productsTotalPrice -= water;
                        System.out.println("Sorry, not enough money");
                    } else {
                        System.out.printf("Purchased %s\n", productType);
                    }
                    break;
                case "Crisps":
                    productsTotalPrice += crisps;

                    if (productsTotalPrice > totalCoinsInserted) {
                        productsTotalPrice -= crisps;
                        System.out.println("Sorry, not enough money");
                    } else {
                        System.out.printf("Purchased %s\n", productType);
                    }
                    break;
                case "Soda":
                    productsTotalPrice += soda;

                    if (productsTotalPrice > totalCoinsInserted) {
                        productsTotalPrice -= soda;
                        System.out.println("Sorry, not enough money");
                    } else {
                        System.out.printf("Purchased %s\n", productType);
                    }
                    break;
                case "Coke":
                    productsTotalPrice += coke;

                    if (productsTotalPrice > totalCoinsInserted) {
                        productsTotalPrice -= coke;
                        System.out.println("Sorry, not enough money");
                    } else {
                        System.out.printf("Purchased %s\n", productType);
                    }
                    break;
                default:
                    System.out.println("Invalid product");
                    break;
            }
        }

    }
}