심플 매출 계산기

import java.util.ArrayList;
import java.util.Random;

public class SalesAnalyzer {

    // 주문 리스트
    private ArrayList<Ramyun> ramyunOrders;
    private ArrayList<Kimbob> kimbobOrders;

    public SalesAnalyzer() {
        this.ramyunOrders = new ArrayList<Ramyun>();
        this.kimbobOrders = new ArrayList<Kimbob>();
    }

    // 메인 테스트
    public static void main(String[] args) {
        SalesAnalyzer sales = new SalesAnalyzer();

        // 랜덤 주문 생성.
        sales.randomOrders();

        // 매출 계산.
        int totalSales = sales.calculateSales();
        System.out.println("총 매출액: " + totalSales + "원");
    }

    // 랜덤 주문 생산기
    public void randomOrders() {
        Random random = new Random();
        int n = 51 + random.nextInt(50);

        for (int i = 0; i < n; i++) {
            if (random.nextBoolean())
                addRamyunOrder(new Ramyun());
            else
                addKimbobOrder(new Kimbob());
        }
    }

    // 라면 주문 기록
    public void addRamyunOrder(Ramyun ramyun) {
        ramyunOrders.add(ramyun);
    }

    // 김밥 주문 기록
    public void addKimbobOrder(Kimbob kimbob) {
        kimbobOrders.add(kimbob);
    }

    // 매출 계산
    public int calculateSales() {
        int raCount = 0;
        int kimCount = 0;

        int raSales = Ramyun.PRICE * raCount;
        int kimSales = Kimbob.PRICE * kimCount;
        int totalSales = 0;

        System.out.printf("[라면] %d개: %d원n", raCount, raSales);
        System.out.printf("[김밥] %d개: %d원n", kimCount, kimSales);
        System.out.println("==================");

        return totalSales;
    }
}

public class Ramyun {
    public static final String NAME = "라면";
    public static final int PRICE = 3000;
}

public class Kimbob {
    public static final String NAME = "김밥";
    public static int PRICE = 2000;
}