CoffeeMachineMenu.java

import java.util.Scanner;

public class CoffeeMachineMenu {
    private static int water = 400;
    private static int milk = 540;
    private static int beans = 120;
    private static int cups = 9;
    private static double money = 50.0;

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

        while (true) {
            System.out.println("\n---- Coffee Machine Menu ----");
            System.out.println("1: Buy a Coffee");
            System.out.println("2: Take the Money");
            System.out.println("3: Check Machine Status");
            System.out.println("4: Turn Off Machine");
            System.out.print("Choose Option: ");

            if (!sc.hasNextInt()) {
                System.out.println("Invalid input! Enter a number.");
                sc.next();
                continue;
            }

            int choice = sc.nextInt();

            switch (choice) {
                case 1:
                    buyCoffee(sc);
                    break;
                case 2:
                    takeMoney();
                    break;
                case 3:
                    printStatus();
                    break;
                case 4:
                    System.out.println("Machine turned off.");
                    sc.close();
                    return;
                default:
                    System.out.println("Invalid choice!");
            }
        }
    }

    private static void buyCoffee(Scanner sc) {
        System.out.println("\n--- Choose Coffee ---");
        System.out.println("1: Espresso (250ml water, 16g beans, 1 cup) - $4.00");
        System.out.println("2: Latte (350ml water, 75ml milk, 20g beans, 1 cup) - $7.00");
        System.out.println("3: Cappuccino (200ml water, 100ml milk, 12g beans, 1 cup) - $6.00");
        System.out.print("Enter Choice: ");

        if (!sc.hasNextInt()) {
            System.out.println("Invalid coffee choice.");
            sc.next();
            return;
        }

        int type = sc.nextInt();

        int requiredWater = 0;
        int requiredMilk = 0;
        int requiredBeans = 0;
        double cost = 0.0;

        switch (type) {
            case 1:
                requiredWater = 250;
                requiredBeans = 16;
                cost = 4.00;
                break;
            case 2:
                requiredWater = 350;
                requiredMilk = 75;
                requiredBeans = 20;
                cost = 7.00;
                break;
            case 3:
                requiredWater = 200;
                requiredMilk = 100;
                requiredBeans = 12;
                cost = 6.00;
                break;
            default:
                System.out.println("Invalid Coffee Choice");
                return;
        }

        if (water >= requiredWater && milk >= requiredMilk
                && beans >= requiredBeans && cups >= 1) {
            water -= requiredWater;
            milk -= requiredMilk;
            beans -= requiredBeans;
            cups--;
            money += cost;
            System.out.println("Making your coffee... Enjoy!");
        } else {
            System.out.println("Insufficient ingredients.");
        }
    }

    private static void takeMoney() {
        System.out.printf("You took $%.2f%n", money);
        money = 0.0;
    }

    private static void printStatus() {
        System.out.println("Water: " + water + " ml");
        System.out.println("Milk: " + milk + " ml");
        System.out.println("Beans: " + beans + " g");
        System.out.println("Cups: " + cups);
        System.out.printf("Money: $%.2f%n", money);
    }
}