Vending Mashine

import java.util.Scanner;

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

        String command = scanner.nextLine();

        double sum = 0;
        //with 0.1, 0.2, 0.5, 1 and 2
        while (!command.equals("Start")) {
            double money = Double.parseDouble(command);

            if (money != 0.1 && money != 0.2 && money != 0.5 && money != 1 && money != 2) {

                System.out.printf("Cannot accept %.2f%n", money);
            } else {
                sum += money;
            }
            command = scanner.nextLine();
        }

        String productName = scanner.nextLine();
        //"Nuts", "Water", "Crisps", "Soda", "Coke". The prices are: 2.0, 0.7, 1.5, 0.8, 1.0
        while (!productName.equals("End")) {
            boolean hasMoney = true;
            switch (productName) {
                case "Nuts":
                    if (sum < 2) {
                        System.out.println("Sorry, not enough money");
                        hasMoney = false;
                    } else {
                        sum -= 2;
                    }
                    break;
                case "Water":
                    if (sum < 0.7) {
                        System.out.println("Sorry, not enough money");
                        hasMoney = false;
                    } else {
                        sum -= 0.7;
                    }
                    break;
                case "Crisps":
                    if (sum < 1.5) {
                        System.out.println("Sorry, not enough money");
                        hasMoney = false;
                    } else {
                        sum -= 1.5;
                    }
                    break;
                case "Soda":
                    if (sum < 0.8) {
                        System.out.println("Sorry, not enough money");
                        hasMoney = false;
                    } else {
                        sum -= 0.8;
                    }
                    break;
                case "Coke":
                    if (sum < 1) {
                        System.out.println("Sorry, not enough money");
                        hasMoney = false;
                    } else {
                        sum -= 1;
                    }
                    break;
                default:
                    System.out.println("Invalid product");
                    hasMoney = false;
                    break;
            }
            if (!hasMoney) {
                productName = scanner.nextLine();
                continue;
            }
            System.out.printf("Purchased %s%n", productName);

            productName = scanner.nextLine();
        }
        System.out.printf("Change: %.2f", sum);

    }
}