编辑代码

import java.util.ArrayList;
import java.util.List;

// 商品类
class Product {
    String name;
    int price;
    int num;

    public Product(String name, int price, int num) {
        this.name = name;
        this.price = price;
        this.num = num;
    }

    // 获取商品价格
    public int getPrice() {
        return price;
    }

    // 获取商品数量
    public int getNum() {
        return num;
    }

    // 设置商品数量
    public void setNum(int num) {
        this.num = num;
    }
}

// 购物车类
class ShoppingCart {
    int total;
    List<Product> products;

    public ShoppingCart() {
        this.total = 0;
        this.products = new ArrayList<>();
    }

    // 向购物车添加商品
    public void add(Product product) {
        products.add(product);
        total += product.getPrice();
        product.setNum(product.getNum() - 1);
    }

    // 从购物车移除商品
    public void remove(Product product) {
        products.remove(product);
        total -= product.getPrice();
        product.setNum(product.getNum() + 1);
    }

    // 显示购物车信息
    public void displayCart() {
        System.out.println("购物车中的商品信息：");
        for (Product product : products) {
            System.out.println("名称：" + product.name + "，价格：" + product.price);
        }
        System.out.println("总金额：" + total);
    }
}

// 主类
public class Main {
    public static void main(String[] args) {
        Product product1 = new Product("苹果", 5, 10);
        Product product2 = new Product("香蕉", 3, 5);
        ShoppingCart cart = new ShoppingCart();
        cart.add(product1);
        cart.add(product2);
        cart.displayCart();
        cart.remove(product1);
        cart.displayCart();
    }
}