用JAVA程序设计食堂点餐系统，可以实现店铺类，食物类，顾客类，测试类的查询

好的，以下是一个简单的用JAVA编写的食堂点餐系统示例，包括店铺类、食品类、顾客类和测试类：

首先，我们需要定义食品类和店铺类，代码如下：

// 食品类
public class Food {
    private String name; // 食品名称
    private double price; // 食品价格

    public Food(String name, double price) {
        this.name = name;
        this.price = price;
    }

    public String getName() {
        return name;
    }

    public double getPrice() {
        return price;
    }
}

// 店铺类
public class Shop {
    private String name; // 店铺名称
    private List<Food> foodList; // 店铺所售食品列表

    public Shop(String name) {
        this.name = name;
        this.foodList = new ArrayList<>();
    }

    public void addFood(Food food) {
        foodList.add(food);
    }

    public List<Food> getFoodList() {
        return foodList;
    }

    public String getName() {
        return name;
    }
}

接下来，我们定义顾客类和测试类，代码如下：

// 顾客类
public class Customer {
    private String name; // 顾客名称

    public Customer(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void orderFood(Shop shop, int foodIndex, int count) {
        List<Food> foodList = shop.getFoodList();
        if (foodIndex >= 0 && foodIndex < foodList.size()) {
            Food food = foodList.get(foodIndex);
            System.out.println(name + "点了" + count + "份" + food.getName() + "，共" + count * food.getPrice() + "元");
        } else {
            System.out.println("该店铺没有该食品！");
        }
    }
}

// 测试类
public class Test {
    public static void main(String[] args) {
        // 店铺1
        Shop shop1 = new Shop("食堂1");
        shop1.addFood(new Food("炒饭", 10.0));
        shop1.addFood(new Food("炒面", 12.0));
        shop1.addFood(new Food("饺子", 8.0));

        // 店铺2
        Shop shop2 = new Shop("食堂2");
        shop2.addFood(new Food("馄饨", 9.0));
        shop2.addFood(new Food("牛肉面", 15.0));
        shop2.addFood(new Food("炒年糕", 11.0));

        // 顾客1点餐
        Customer customer1 = new Customer("张三");
        customer1.orderFood(shop1, 0, 2);
        customer1.orderFood(shop2, 1, 1);

        // 顾客2点餐
        Customer customer2 = new Customer("李四");
        customer2.orderFood(shop1, 2, 3);
        customer2.orderFood(shop2, 3, 2);
        customer2.orderFood(shop2, 4, 1);
    }
}

这个程序定义了食品类和店铺类，并在测试类中创建了两个店铺和两个顾客进行点餐。您可以根据具体需求对程序进行修改和完善。