java Realizes Simple Small Supermarket Program

This article example for everyone to share the java small supermarket program specific code, for your reference, the specific content is as follows

1. Character Pack

1. Customer category

package person;

public class Customer {
 public String name;
 public double money;
 public boolean isDrivingCar;
}

2. Supermarket bag

1. Small supermarkets

package supermarket;

public class LittleSuperMarket {
 public String superMarketName;
 public String address;
 public int parkingCount;
 public double incomingSum;
 public Merchandise[] merchandises;
 public int[] merchandisesold;
}

2. Commodities

package supermarket;

public class Merchandise {
 public String name;
 public String id;
 public int count;
 public double soldPrice;
 public double purchasePrice;
}

3. Main program

import person.Customer;
import supermarket.LittleSuperMarket;
import supermarket.Merchandise;

import java.util.Scanner;

public class Run {
 public static void main(String[] args) {

  //通过小超市类创建超市实体
  LittleSuperMarket littleSuperMarket = new LittleSuperMarket();

  //为超市属性赋值
  littleSuperMarket.address = "世纪大道999号";
  littleSuperMarket.superMarketName = "我家超市";
  littleSuperMarket.parkingCount = 200;

  //为超市商品属性new1个大小为200的数组，类型为Merchandise
  littleSuperMarket.merchandises = new Merchandise[200];
  //创造下标相同的数组记录相同下标商品的卖出个数
  littleSuperMarket.merchandisesold = new int[littleSuperMarket.merchandises.length];


  //赋值
  for (int i = 0; i < littleSuperMarket.merchandises.length; i++) {
   //创建类型为merchandise的局部变量m，并为其赋值
   Merchandise m = new Merchandise();
   m.count = 200;
   m.id = "ID" + i;
   m.name = "商品" + i;
   m.purchasePrice = 200 * Math.random();
   m.soldPrice = (1 + Math.random()) * m.purchasePrice;

   //将每次局部变量的值赋给对应下标的merchandise实体，此时实体merchandise有了值
   littleSuperMarket.merchandises[i] = m;

  }
  System.out.println("超市开张了！! ！");


  boolean open = true;
  Scanner scanner = new Scanner(System.in);


  while (open) {
   System.out.println("本店叫做：" + littleSuperMarket.superMarketName);
   System.out.println("本店地址：" + littleSuperMarket.address);
   System.out.println("共拥有停车位：" + littleSuperMarket.parkingCount);
   System.out.println("今天的营业额为：" + littleSuperMarket.incomingSum);
   System.out.println("共有商品：" + littleSuperMarket.merchandises.length + "种");


   //为顾客的属性赋值
   Customer customer = new Customer();
   customer.name = "编号：" + ((int) (Math.random() * 500));
   customer.isDrivingCar = Math.random() > 0.4;
   customer.money = (1 + Math.random()) * 10000;


   //先判断顾客是否开车
   if (customer.isDrivingCar) {
    System.out.println("欢迎顾客" + customer.name + "号的顾客驾车而来！");
    //顾客开车的条件下车位数>0，车位减1，否则重新进入循环（车位小于零，顾客无法停车）
    if (littleSuperMarket.parkingCount > 0) {
     littleSuperMarket.parkingCount--;
     System.out.println("欢迎顾客" + customer.name + "号的顾客光临" + littleSuperMarket.superMarketName + ",车位剩余" + littleSuperMarket.parkingCount + "，钱包剩余" + customer.money);
    } else {
     System.out.println("对不起，停车位已满，欢迎下次光临");
     continue;
    }
    //没开车，直接进入
   } else {
    System.out.println("欢迎顾客" + customer.name + "号的顾客光临" + littleSuperMarket.superMarketName + "钱包剩余" + customer.money);
   }


   //在购买流程外部创建变量统计总共花费和购买数量
   double totalCast = 0;
   int numToBuy;


   //购买循环
   while (true) {


    System.out.println("本店提供" + littleSuperMarket.merchandises.length + "种商品，欢迎选购。请输入商品编号:");


    int InDex = scanner.nextInt();
    //对商品索引的合法性进行检测
    if (InDex <= 0) {
     break;
    }
    if (InDex > littleSuperMarket.merchandises.length - 1) {
     System.out.println("对不起，本店没有那么多商品。请输入0到" + (littleSuperMarket.merchandises.length - 1) + "之间的数字");
     continue;
    }


    System.out.println("您选购的商品的名字是:" + littleSuperMarket.merchandises[InDex].name + "\t售价为：" + littleSuperMarket.merchandises[InDex].soldPrice);
    System.out.println("请问你要买几个？");

    numToBuy = scanner.nextInt();
    //对购买数量的合法性进行检测
    if (numToBuy <= 0) {
     System.out.println("不买看看也好，欢迎继续选购");
     continue;
    }
    if (numToBuy > littleSuperMarket.merchandises[InDex].count) {
     System.out.println("本店没有那么多商品，欢迎继续挑选");
     continue;
    }
    /*其实这里的逻辑不太好，但是懒得改了，等再学习1段时间再好好完善这个小程序。这里把花费放在购买循环外面才是比较好的逻辑，然后在这里用if循环判断购买的1系列合法性即可。
     或者把售卖个数的属性也在这里改变赋值会容易懂，我这里放到后面了，懒得改了。等下次优化功能时再整体优化逻辑
     */

    //输入合法，求总共花费，并对商品库存进行相应的扣除
    totalCast += littleSuperMarket.merchandises[InDex].soldPrice * numToBuy;
    littleSuperMarket.merchandises[InDex].count -= numToBuy;


    //仍然属于合法性检测，检测顾客的钱是否够支付他所购买商品的总价
    if (customer.money < totalCast) {

     System.out.println("对不起，您身上的钱不足以支付您的商品，欢迎下次选购");
     //钱不足以支付，对应商品的数量再把刚才购买但未成功支付的商品数量归还
     //就像你在超市里买东西，放进购物车了，货架上超市库存少了，其他顾客拿不到了，等你支付时钱不够，商品被放回，其他顾客可以拿到的数量增加，即商品库存增加
     littleSuperMarket.merchandises[InDex].count += numToBuy;
     //这1段当时写的时候我也比较乱
     //因为总价计算在外面了，此时总价已将超出了你的钱数循环从这里出去如果总价不置零，你的钱数1直小于总价，该顾客1直无法购买商品
     totalCast = 0;

    } else {
     //正确购买，售出数量对应增加，顾客口袋里的钱对应减少
     littleSuperMarket.merchandisesold[InDex] += numToBuy;
     customer.money -= totalCast;

     //开车来的话，顾客离开，车位释放
     if (customer.isDrivingCar) {
      littleSuperMarket.parkingCount++;
     }
    }
   }

   littleSuperMarket.incomingSum += totalCast;
   //每次循环结束，该人总钱数得出将该人的totalCast累加到littleSuperMarket.incomingSum中，得出总共收入
   //littleSuperMarket.incomingSum和totalIncoming数值相等，基本为同1意思
   //littleSuperMarket.incomingSum += totalCast;

   System.out.println("顾客" + customer.name + "号的顾客共消费" + totalCast + "，还剩余" + customer.money);
   System.out.println("今天还要继续营业吗？");
   open = scanner.nextBoolean();
  }

  System.out.println("超市关门了！");
  System.out.println("今天总的营业额为" + littleSuperMarket.incomingSum + "营业情况如下：");


  //定义总收入和总净利润
  double totalNetIncoming = 0;
  double totalIncoming = 0;


  for (int i = 0; i < littleSuperMarket.merchandisesold.length; i++) {
   //只统计售出数量大于0的商品
   if (littleSuperMarket.merchandisesold[i] > 0) {
    //计算总利润和总净利润，通过累加求得
    double incoming = littleSuperMarket.merchandises[i].soldPrice * littleSuperMarket.merchandisesold[i];
    double netIncoming = (littleSuperMarket.merchandises[i].soldPrice - littleSuperMarket.merchandises[i].purchasePrice) * littleSuperMarket.merchandisesold[i];
    totalIncoming += incoming;
    totalNetIncoming += netIncoming;
    System.out.println(littleSuperMarket.merchandises[i].name + "售出了" + littleSuperMarket.merchandisesold[i] + "个。销售额为" + incoming + ",净利润为" + netIncoming);

   }
  }
  System.out.println("今日总销售额为：" + totalIncoming + ";今日总净利润为：" + totalNetIncoming);
 }
}