import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

class Product {
    private String id;
    private String name;
    private double price;
    private int stock;

    public Product(String id, String name, double price, int stock) {
        this.id = id;
        this.name = name;
        this.price = price;
        this.stock = stock;
    }

    public String getId() {
        return id;
    }

    public String getName() {
        return name;
    }

    public double getPrice() {
        return price;
    }

    public int getStock() {
        return stock;
    }
}

class ProductDao {
    private Map<String, Product> productMap;

    public ProductDao() {
        productMap = new HashMap<>();
    }

    public void addProduct(Product product) {
        productMap.put(product.getId(), product);
    }

    public Product getProduct(String id) {
        return productMap.get(id);
    }
}

public class Main {
    public static void main(String[] args) {
        ProductDao productDao = new ProductDao();
        Product product1 = new Product("001", "商品A", 100.0, 100);
        Product product2 = new Product("002", "商品B", 200.0, 50);
        Product product3 = new Product("003", "商品C", 300.0, 80);

        productDao.addProduct(product1);
        productDao.addProduct(product2);
        productDao.addProduct(product3);

        Product product4 = new Product("004", "商品D", 400.0, 60);
        productDao.addProduct(product4);

        Product product5 = new Product("005", "商品E", 500.0, 70);
        productDao.addProduct(product5);

        List<Product> products = productDao.getProducts();
        for (Product product : products) {
            System.out.println("ID: " + product.getId() + ", Name: " + product.getName() + ", Price: " + product.getPrice() + ", Stock: " + product.getStock());
        }
    }
}