一、需求描述

1、完成菜品的上架功能

2、完成菜品的浏览功能

二、开发设计

1、需要设计一个菜品类，用于创建菜品对象

2、需要一个菜品操作类，用于封装菜品上架和菜品浏览功能

3、测试程序

三、代码实现

3.1 Food类

package com.itheima.arraylist;

public class Food {
    private String name;//菜品名称
    private double price;//菜品价格
    private String info;//菜品描述信息

    public Food() {
    }

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

    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 String getInfo() {
        return info;
    }

    public void setInfo(String info) {
        this.info = info;
    }
}

3.2 FoodOperator类

package com.itheima.arraylist;

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

public class FoodOperator {
    //菜品操作类，负责上架和浏览菜品
    //定义一个ArrayList集合对象，负责存储菜品对象信息
    private ArrayList<Food> foodlist = new ArrayList<>();

    //上架菜品功能
    public void addFood(){
        //创建一个菜品对象
        Food f = new Food();

        //录入菜品信息
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入菜品名称：");
        String name = sc.next();
        f.setName(name);

        System.out.println("请输入菜品价格");
        double price = sc.nextDouble();
        f.setPrice(price);

        System.out.println("请输入菜品描述");
        String desc = sc.next();
        f.setInfo(desc);

        //添加信息到集合
        foodlist.add(f);
        System.out.println("上架成功");
    }

    //浏览菜品功能
    public void showAllFoods(){
        if (foodlist.size() == 0){
            System.out.println("还没有菜品哦，请先去上架");
        }
        for (int i = 0; i < foodlist.size(); i++) {
            Food f = foodlist.get(i);
            System.out.println(f.getName());
            System.out.println(f.getPrice());
            System.out.println(f.getInfo());
            System.out.println("--------------------");
        }
    }

    public void start(){
        Scanner sc = new Scanner(System.in);
        while (true){
            System.out.println("请选择功能：");
            System.out.println("1-上架菜品");
            System.out.println("2-展示菜品");
            System.out.println("3-退出");
            System.out.println("请输入你的选择：");
            String command = sc.next();
            switch (command){
                case "1":
                    addFood();
                    break;
                case "2":
                    showAllFoods();
                    break;
                case "3":
                    System.out.println("欢迎下次再来");
                    return;
                default:
                    System.out.println("您输入的命令不存在，请您重新输入！！！");
            }
        }
    }
}

3.2 test

package com.itheima.arraylist;

import java.util.ArrayList;

public class ArrayListDemo2 {
    public static void main(String[] args) {
        //商家菜品上菜操作
        //涉及一个菜品类food，负责创建菜品对象，封装菜品数据
        FoodOperator operator = new FoodOperator();
        operator.start();
    }
}