Java点餐系统开发-源码

package CRJ; import java.util.ArrayList; import java.util.List; import java.util.Scanner; /* * 点菜主程序 * */ public class DishApp { //定义集合（表示拥有的菜品） static List<Dish> dishList = new ArrayList<>(); //用户点的 static List<Dish> personDish = new ArrayList<>(); //提起那准备一些菜品，展示 public static void main(String[] args) { //初始化一些菜品 initDish(); //创建一个扫描器 Scanner s = new Scanner(System.in); while (true) { showMenu(); //获取内容 int num = s.nextInt(); switch (num) { case 1: while (true) { showDishMenu(); //获取用户输入的内容 int id=s.nextInt(); if(id==0) { break; } Dish dish = dishList.get(id - 1); System.out.println("你点了"+dish.name+"菜"); personDish.add(dish); } case 2: //以点菜品 showPersonDish(); break; case 3: //买单 buy(); return; default: System.out.println("请重新输入"); break; } } } private static void showDishMenu() { System.out.println("----请点菜----"); //遍历集合 for (int i = 0; i < dishList.size(); i++) { //从集合中使用i获取每一个菜品对象 Dish dish = dishList.get(i); System.out.print(dish.id + "\t" + dish.name + "\t" + dish.price + "\n"); } System.out.println("----输入序号点菜，按0返回上一级---"); } private static void showPersonDish() { System.out.println("---你已点---"); for (Dish dish : personDish) { System.out.println(dish.id+"\t"+dish.name+"\t"+dish.price); } } private static void buy() { System.out.println("结账"); double sum=0f; for (Dish dish : personDish) { sum +=+dish.price; } System.out.println("总价为"+sum+"元"); } private static void showMenu() { System.out.println("----主菜单----"); System.out.println("菜单\t\t\t 1"); System.out.println("已点菜品\t\t 2"); System.out.println("买单\t\t\t 3"); System.out.println("--根据编号请选择服务--"); } //初始化一些菜品 public static void initDish() { Dish dish = new Dish(1, "香辣肉丝", 29.99); Dish dish2 = new Dish(2, "酸菜鱼", 39.99); Dish dish3 = new Dish(3, "鱼香肉丝", 49.99); dishList.add(dish); dishList.add(dish2); dishList.add(dish3); dishList.add(new Dish(4, "拌凉菜", 12.66)); dishList.add(new Dish(5, "炒鸡蛋", 12.77)); dishList.add(new Dish(6, "地三鲜", 32.88)); } }