package collection_homework.class7;
import java.util.Scanner;
public class Goods {
//定义存储商品名称的数组
String[] products = new String[]{"电风扇","洗衣机","电视机","冰箱","空调机"};
//定义存储商品价格的数组
double[] prices = new double[]{124.23,4500.0,8800.9,5000.88,4456.0};
//登录验证
public boolean login(){
//验证是否成功的一个标识，默认为false
boolean flag = false;
Scanner input = new Scanner(System.in);
System.out.print("请输入用户名：");
String username = input.next();
System.out.print("请输入密码：");
String password = input.next();
//验证
if("TOM".equals(username) && "123".equals(password)){
//合法
System.out.println("登录成功！");
//修改标识位
flag = true;
}
return flag;
}
//显示商品列表
public void show(){
System.out.println("*********************欢迎进入商品批发城*********************");
System.out.println("tt编号t商品t价格");
//遍历商品名称
for (int i = 0; i < products.length; i++) {
System.out.print("tt" + (i+1));
System.out.print("t" + products[i]);
System.out.print("t" + change(prices[i]) + "n");
}
System.out.println("***********************************************************");
}
//按照指定格式输出价格
public String change(double price){
StringBuffer stringBuffer = new StringBuffer(String.valueOf(price));
//根据传递的价格在合适的位置插入，
for (int i = stringBuffer.indexOf(".") - 3; i>0; i = i-3) {
//插入，
stringBuffer.insert(i,",");
}
return stringBuffer.toString();
}
//测试方法
public static void main(String[] args) {
Goods goods = new Goods();
Scanner input = new Scanner(System.in);
//验证用户是否是合法用户
if(goods.login()){
//显示商品列表
goods.show();
System.out.print("请输入您批发的商品编号：");
int proId = Integer.parseInt(input.next());
System.out.print("请输入批发数量：");
int proNum = Integer.parseInt(input.next());
//计算总价格
double totalPrice = goods.prices[proId-1] * proNum;
System.out.println("您需要付款：" + goods.change(totalPrice));
}
}
}
