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CoffeeMachine.java
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CoffeeMachine.java
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package machine;
import java.util.Scanner;
enum Action {
BUY("buy"), FILL("fill"), TAKE("take"),
REMAINING("remaining"), BACK("back"), EXIT("exit");
String action;
Action(String action) {
this.action = action;
}
public static Action findByInput(String action) {
for (Action value : values()) {
if (action.equals(value.action)) {
return value;
}
}
throw new IllegalArgumentException(action +
" is not a valid action");
}
}
enum CoffeeType {
ESPRESSO(250, 0, 16, 4),
LATTE(350, 75, 20, 7),
CAPPUCCINO(200, 100, 12, 6);
private final int water;
private final int milk;
private final int coffeeBeans;
private final int cost;
CoffeeType(int water, int milk, int coffeeBeans, int cost) {
this.water = water;
this.milk = milk;
this.coffeeBeans = coffeeBeans;
this.cost = cost;
}
public int getWater() {
return water;
}
public int getMilk() {
return milk;
}
public int getCoffeeBeans() {
return coffeeBeans;
}
public int getCost() {
return cost;
}
}
public class CoffeeMachine {
private static final Scanner scanner = new Scanner(System.in);
private int water;
private int milk;
private int coffeeBeans;
private int cups;
private int money;
public CoffeeMachine(int water, int milk, int coffeeBeans, int cups, int money) {
this.water = water;
this.milk = milk;
this.coffeeBeans = coffeeBeans;
this.cups = cups;
this.money = money;
}
private static boolean chooseAction(CoffeeMachine coffeeMachine, String choose) {
switch (Action.findByInput(choose)) {
case BUY:
coffeeMachine.buy();
break;
case FILL:
coffeeMachine.fill();
break;
case TAKE:
coffeeMachine.take();
break;
case REMAINING:
coffeeMachine.showInfo();
break;
case EXIT:
return false;
default:
System.out.println("Invalid input!");
break;
}
return true;
}
private void buy() {
System.out.println("What do you want to buy? 1 - espresso, 2 - latte, 3 - cappuccino, back - to main menu:");
switch (scanner.next()) {
case "1":
checkResourcesAndBuy(CoffeeType.ESPRESSO);
break;
case "2":
checkResourcesAndBuy(CoffeeType.LATTE);
break;
case "3":
checkResourcesAndBuy(CoffeeType.CAPPUCCINO);
break;
case "back":
break;
default:
System.out.println("coffee type not found. enter a valid input");
break;
}
}
private void checkResourcesAndBuy(CoffeeType coffee) {
if (water - coffee.getWater() < 0) {
System.out.println("Sorry, not enough water!\n");
} else if (milk - coffee.getMilk() < 0) {
System.out.println("Sorry, not enough milk!\n");
} else if (coffeeBeans - coffee.getCoffeeBeans() < 0) {
System.out.println("Sorry, not enough coffeeBeans!\n");
} else if (cups - 1 < 0) {
System.out.println("Sorry, not enough cups!\n");
} else {
System.out.println("I have enough resources, making you a coffee!\n");
water -= coffee.getWater();
milk -= coffee.getMilk();
coffeeBeans -= coffee.getCoffeeBeans();
cups -= 1;
money += coffee.getCost();
}
}
private void fill() {
System.out.println("Write how many ml of water do you want to add:");
water += scanner.nextInt();
System.out.println("Write how many ml of milk do you want to add:");
milk += scanner.nextInt();
System.out.println("Write how many grams of coffee beans do you want to add:");
coffeeBeans += scanner.nextInt();
System.out.println("Write how many disposable cups of coffee do you want to add:");
cups += scanner.nextInt();
}
private void take() {
System.out.println("I gave you $" + money);
money = 0;
}
public void showInfo() {
System.out.println("\nThe coffee machine has:\n" +
String.format("%d of water\n", water) +
String.format("%d of milk\n", milk) +
String.format("%d of coffee beans\n", coffeeBeans) +
String.format("%d of disposable cups\n", cups) +
String.format("$%d of money\n", money));
}
public static void main(String[] args) {
CoffeeMachine coffeeMachine = new CoffeeMachine(400, 540, 120, 9, 550);
do {
System.out.println("Write action (buy, fill, take, remaining, exit):");
} while (chooseAction(coffeeMachine, scanner.next()));
}
}