培养Java面向对象思想—点餐系统

功能演示

1. 主菜单（showMenu）
2. 菜单界面（showDish）
3. 已点菜品界面
4. 结账界面
5. 全部概览

功能实现

1. Dish类

package com.program;


/**
 * @author Chris
 */
public class Dish {
          
   
    private int no;
    private String name;
    private double price;

    public Dish(int no, String name, double price) {
          
   
        this.no = no;
        this.name = name;
        this.price = price;
    }

    public int getNo() {
          
   
        return no;
    }

    public String getName() {
          
   
        return name;
    }

    public double getPrice() {
          
   
        return price;
    }

    @Override
    public String toString() {
          
   
        return "Dish{" +
                "no=" + no +
                ", name=" + name +  +
                ", price=" + price +
                };
    }
}

2.DishApp类

package com.program;


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

/**
 * @author Chris
 */
public class DishApp {
          
   

    private static List<Dish> dishList = new ArrayList<>();
    private static List<Dish> orderList = new ArrayList<>();

    public static void main(String[] args) {
          
   
        InitDish();
        Scanner in = new Scanner(System.in);
        while (true){
          
   
            showMenu();
            int choice = in.nextInt();
            switch (choice){
          
   
                case 1:
                    while (true){
          
   
                        showDish();
                        int id = in.nextInt();
                        if(id == 0){
          
   
                            break;
                        }
                        orderList.add(dishList.get(id-1));
                        System.out.println("已点"+id+"号菜品，名称是"+dishList.get(id-1).getName());
                    }
                    break;
                case 2:
                    showOrder();
                    break;
                case 3:
                    buyOrder();
                    break;
            }
            if(choice == 0){
          
   
                break;
            }
        }

    }

    public static void buyOrder() {
          
   
        System.out.println("结账中，请稍后...");
        double total = 0;
        for(Dish dish : orderList){
          
   
            total+= dish.getPrice();
        }
        System.out.println("您本次共计消费"+total+"元");
    }

    public static void InitDish(){
          
   
        dishList.add(new Dish(1,"烧茄子",15.0));
        dishList.add(new Dish(2,"蒸馒头",10.5));
        dishList.add(new Dish(3,"炖鲫鱼",20.4));
        dishList.add(new Dish(4,"炒牛肉",33.0));
        dishList.add(new Dish(5,"炸豆腐",7.0));
    }
    public static void showMenu(){
          
   
        System.out.println("--------主菜单--------");
        System.out.println("1	菜单");
        System.out.println("2	已点菜单");
        System.out.println("3	结账");
        System.out.println("0	退出");
        System.out.println("----根据编号选择相应服务----");
    }
    public static void showDish(){
          
   
        System.out.println("----请点菜，选择相应菜品编号----");
        for(Dish dish:dishList){
          
   
            System.out.println(dish.getNo()+"	"+dish.getName()+"	"+dish.getPrice());
        }
        System.out.println("-----按0返回上一级-----");
    }
    public static void showOrder(){
          
   
        System.out.println("亲，您已点以下菜品：");
        System.out.println("编号	名称		价格");
        for(Dish dish:orderList){
          
   
            System.out.println(dish.getNo()+"	"+dish.getName()+"	"+dish.getPrice());
        }
    }
}