用java写一个鲜花购物车系统

好的，这里是一个简单的鲜花购物车系统的Java实现，仅供参考。

首先，我们需要创建一个Flower类表示鲜花，包含鲜花的名称、价格和库存：

public class Flower {
    private String name;
    private double price;
    private int stock;

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

    public String getName() {
        return name;
    }

    public double getPrice() {
        return price;
    }

    public int getStock() {
        return stock;
    }

    public void setStock(int stock) {
        this.stock = stock;
    }
}

接下来，我们创建一个FlowerShop类表示鲜花商店，包含鲜花列表和购物车：

import java.util.ArrayList;

public class FlowerShop {
    private ArrayList<Flower> flowers;
    private ArrayList<Flower> cart;

    public FlowerShop() {
        flowers = new ArrayList<>();
        cart = new ArrayList<>();
    }

    public void addFlower(Flower flower) {
        flowers.add(flower);
    }

    public void addToCart(Flower flower) {
        if (flower.getStock() > 0) {
            cart.add(flower);
            flower.setStock(flower.getStock() - 1);
            System.out.println("Added " + flower.getName() + " to cart.");
        } else {
            System.out.println(flower.getName() + " is out of stock.");
        }
    }

    public void removeFromCart(Flower flower) {
        cart.remove(flower);
        flower.setStock(flower.getStock() + 1);
        System.out.println("Removed " + flower.getName() + " from cart.");
    }

    public void viewCart() {
        if (cart.size() == 0) {
            System.out.println("Your cart is empty.");
        } else {
            System.out.println("Your cart contains:");
            double total = 0;
            for (Flower flower : cart) {
                System.out.println("- " + flower.getName() + " ($" + flower.getPrice() + ")");
                total += flower.getPrice();
            }
            System.out.println("Total: $" + total);
        }
    }

    public void viewFlowers() {
        if (flowers.size() == 0) {
            System.out.println("There are no flowers available.");
        } else {
            for (Flower flower : flowers) {
                System.out.println(flower.getName() + " ($" + flower.getPrice() + ") - " + flower.getStock() + " in stock");
            }
        }
    }
}

在FlowerShop类中，我们定义了添加鲜花、添加到购物车、从购物车中移除、查看购物车和查看鲜花列表等操作。

最后，我们创建一个FlowerShopRunner类来演示鲜花购物车系统：

public class FlowerShopRunner {
    public static void main(String[] args) {
        FlowerShop shop = new FlowerShop();

        // 添加几种鲜花
        shop.addFlower(new Flower("Rose", 10.0, 5));
        shop.addFlower(new Flower("Lily", 8.0, 3));
        shop.addFlower(new Flower("Tulip", 6.0, 2));

        // 查看鲜花列表
        shop.viewFlowers();

        // 添加鲜花到购物车
        shop.addToCart(shop.getFlowers().get(0));
        shop.addToCart(shop.getFlowers().get(0));
        shop.addToCart(shop.getFlowers().get(1));
        shop.addToCart(shop.getFlowers().get(2));
        shop.addToCart(shop.getFlowers().get(2));
        shop.addToCart(shop.getFlowers().get(2));

        // 查看购物车
        shop.viewCart();

        // 从购物车中移除鲜花
        shop.removeFromCart(shop.getCart().get(0));

        // 查看购物车
        shop.viewCart();
    }
}

这个简单的鲜花购物车系统演示了如何添加鲜花、将鲜花添加到购物车、从购物车中移除鲜花以及查看购物车和鲜花列表等操作。