[Java] 자판기(VendingMachine) 구현하기

🥤 자판기객체를 만들어서 돈 입력, 음료선택, 잔돈반환 등등 조건을 맞추어서 구현하시오.

package RealProject;

// 음료 객체
class Drink {
	private int drinkNum;
	private String name;
	private int price;
	
	public Drink(int drinkNum, String name, int price) {
		setDrinkNum(drinkNum);
		setName(name);
		setPrice(price);
	}
	
	public String toString() {
		return drinkNum + ". " + name + ": " + price + "원";
	}
	
	public int getDrinkNum() {
		return drinkNum;
	}
	
	public void setDrinkNum(int drinkNum) {
		this.drinkNum = drinkNum;
	}
	
	public String getName() {
		return name;
	}
	
	public void setName(String name) {
		this.name = name;
	}
	
	public int getPrice() {
		return price;
	}
	
	public void setPrice(int price) {
		this.price = price;
	}
	
	
}

// 자판기 객체
class VendingMachine {
	public static final int COKE = 1;
	public static final int WATER = 2;
	public static final int TEA = 3;
	private Drink coke = new Drink(COKE, "콜라", 1500);
	private Drink water = new Drink(WATER, "물", 600);
	private Drink tea = new Drink(TEA, "녹차", 1000);
	private int inputMoney;
	
	// 메뉴
	public void menu() { 
		System.out.println("===================");
		System.out.println("        Menu       ");
		System.out.println("===================");
		System.out.println(coke + "\n" + water + "\n" + tea);
		System.out.println("===================");
	}
	
	public int getInputMoney() {
		return inputMoney;
	}

	public void setInputMoney(int inputMoney) {
		this.inputMoney = inputMoney;
	}

	public Drink getCoke() {
		return coke;
	}

	public void setCoke(Drink coke) {
		this.coke = coke;
	}

	public Drink getWater() {
		return water;
	}

	public void setWater(Drink water) {
		this.water = water;
	}

	public Drink getTea() {
		return tea;
	}

	public void setTea(Drink tea) {
		this.tea = tea;
	}

	// 넣은 돈
	public void intputMoney(int inputMoney) {
		boolean result = true;
		if(inputMoney >= 600) {
			this.inputMoney += inputMoney;
			System.out.println("넣은 돈: " + inputMoney + "원");
		} else {
			System.out.println("600원 이상 돈을 넣어주세요.");
		}
	}
	// 음료 선택
	public Drink drinkSelect(int drinkNum) {
		switch(drinkNum) {
			case COKE : 
				return drinkOutCondition(coke);
			case WATER :
				return drinkOutCondition(water);
			case TEA :
				return drinkOutCondition(tea);
			default :
				return null;
		}
	}
	// 잔돈 반환
	public int changeMoney(Drink drink) {
		int change = inputMoney - drink.getPrice();
		System.out.println("잔액: " + change + "원" );
		return change;
	}
	// 음료 나오는 조건
	public Drink drinkOutCondition(Drink drink) {
		if(inputMoney < drink.getPrice()) {
			return null;
		}
		return drink;
	}
	
}

public class UseVendingMachine{

	public static void main(String[] args) {
		VendingMachine vm = new VendingMachine();
		
		vm.menu();
		vm.drinkSelect(VendingMachine.WATER);
		vm.intputMoney(1500);
		vm.changeMoney(vm.drinkSelect(VendingMachine.WATER));
		
		
	}