Java基础巩固小项目点菜系统的实现

时间：2022-06-05 11:18:57|栏目：JAVA代码|点击：次

项目简绍

点菜小系统，可以实现点菜，查看已经点的菜，买单查看总金额

所需技术

面向对象，集合(ArrayList)

因为项目真的很小，所需要技术很有限，真的比较简单

思路讲解

创建菜品类、属性
创建菜品列表并进行初始化
主菜单循环
对选项补充，创建所需方法
完善代码并测试
优化代码

完整代码演示

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

public class DishApp {
    static List<Dish> dishList = new ArrayList<>();
    static List<Dish> hadorder = new ArrayList<Dish>();
//创建所有菜集合和已经点的菜集合
//这里注意集合要为全局变量，静态的
    public static void main(String[] args) {
        initDisk();
        Scanner scanner = new Scanner(System.in);
        while (true) {
            showMenu();
            int num = scanner.nextInt();
            switch (num) {
                case 1:
                    while (true) {
                        order();
                        int id = scanner.nextInt();
                        if (id == 0) {
                            break;
                        }
                        Dish dish = dishList.get(id - 1);
                        System.out.println("点了" + dish.name);
                        hadorder.add(dish);

                    }
                case 2:
                    showHadOrder();
                    break;
                case 3:
                    buy();
                    break;
                default:
                    break;

            }
        }
    }
//初始化菜表
    public static void initDisk() {//菜品可根据需要写，我这里就简写一下哈?
        Dish dish1 = new Dish(1, "米", 1);
        Dish dish2 = new Dish(2, "面", 1);
        Dish dish3 = new Dish(3, "粉", 1);
        dishList.add(dish1);
        dishList.add(dish2);
        dishList.add(dish3);
    }
//主菜单
    public static void showMenu() {
        System.out.println("-----主菜单-----");
        System.out.println("-----1.菜单-----");
        System.out.println("-----2.已点菜---");
        System.out.println("-----3.买单-----");
    }
//列出菜表
    public static void showDisk() {
        System.out.println("-------菜单---------");
        for (Dish dish : dishList) {
            System.out.println(dish.id + "\t" + dish.name + "\t" + dish.price);
        }
    }
//点菜
    public static void order() {
        System.out.println("-----请点菜-0推出-----");
        showDisk();
        Scanner scanner = new Scanner(System.in);
    }
//查看已经点的菜
    public static void showHadOrder() {
        System.out.println("------已点菜-------");
        for (Dish dish : hadorder) {
            System.out.println(dish.id + "\t" + dish.name + "\t" + dish.price);

        }
    }
//买单
    public static void buy() {
        int sum = 0;
        for (Dish dish : hadorder) {
            sum += dish.price;
        }
        System.out.println("共消费" + sum);

    }
}
//菜品类
class Dish {
    int id;
    String name;
    double price;
//构造器对属性赋值
    public Dish(int id, String name, double price) {
        this.id = id;
        this.name = name;
        this.price = price;
    }


}