java实现简单的小超市程序

本文实例为大家分享了java实现小超市程序的具体代码，供大家参考，具体内容如下

一.人物包

1.顾客类

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

二.超市包

1.小超市类

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

2.商品类

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

三.主程序

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new一个大小为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，车位减一，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，等再学习一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循环判断购买的一系列合法性即可。     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;     //这一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，你的钱数一直小于总价，该顾客一直无法购买商品     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，基本为同一意思   //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); }}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。

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