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java,import java.util.ArrayList;,import java.util.List;,,class Product {, String name;, double price;,, public Product(String name, double price) {, this.name = name;, this.price = price;, },},,class ShoppingCart {, List products;,, public ShoppingCart() {, products = new ArrayList();, },, public void addProduct(Product product) {, products.add(product);, },, public double getTotalPrice() {, double total = 0;, for (Product product : products) {, total += product.price;, }, return total;, },},,public class Main {, public static void main(String[] args) {, ShoppingCart cart = new ShoppingCart();, cart.addProduct(new Product("苹果", 5.0));, cart.addProduct(new Product("香蕉", 3.0));, System.out.println("购物车总价: " + cart.getTotalPrice());, },},
“我们需要创建一个购物车类(ShoppingCart),用于存储商品信息,我们需要创建一个商品类(Product),用于表示商品,接下来,我们将实现购物车类中的方法,如添加商品、删除商品、计算总价等。
1、创建商品类(Product)
public class Product { private String name; // 商品名称 private double price; // 商品价格 private int quantity; // 商品数量 public Product(String name, double price, int quantity) { this.name = name; this.price = price; this.quantity = quantity; } // getter和setter方法 public String getName() { return name; } public void setName(String name) { this.name = name; } public double getPrice() { return price; } public void setPrice(double price) { this.price = price; } public int getQuantity() { return quantity; } public void setQuantity(int quantity) { this.quantity = quantity; } }
2、创建购物车类(ShoppingCart)
import java.util.ArrayList; import java.util.List; public class ShoppingCart { private List<Product> products; // 存储商品的列表 public ShoppingCart() { products = new ArrayList<>(); } // 添加商品到购物车 public void addProduct(Product product) { products.add(product); } // 从购物车中删除商品 public void removeProduct(Product product) { products.remove(product); } // 计算购物车中商品的总价 public double calculateTotalPrice() { double totalPrice = 0; for (Product product : products) { totalPrice += product.getPrice() * product.getQuantity(); } return totalPrice; } }
3、使用购物车类(ShoppingCart)
public class Main { public static void main(String[] args) { // 创建商品对象 Product product1 = new Product("苹果", 5.0, 10); Product product2 = new Product("香蕉", 3.0, 5); // 创建购物车对象 ShoppingCart shoppingCart = new ShoppingCart(); // 将商品添加到购物车 shoppingCart.addProduct(product1); shoppingCart.addProduct(product2); // 计算购物车中商品的总价 double totalPrice = shoppingCart.calculateTotalPrice(); System.out.println("购物车中商品的总价为:" + totalPrice); } }
运行上述代码,将输出购物车中商品的总价。
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