为什么System.out.println("您需要支付"+tatPrice1+"元");中+tatPrice1+输出始终为零

Question

import java.util.Scanner;public class subway {   private int price;   private int staStation;   private int endStation;   private int money;   private int number;   public void subway(){}   public void price1(){   int number1=endStation-staStation;   if(number1<=5){   price=3;   }   else if(number1<=8){   price=4;   }   else{   price=5;   }   }   public void shuru(){      Scanner scanner =new Scanner(System.in);   System.out.println("请输入起始站");   staStation=scanner.nextInt();   System.out.println("请输入终点站");   endStation=scanner.nextInt();   System.out.println("请输入票数");   number=scanner.nextInt();      }   public void shuru1(){   Scanner scanner =new Scanner(System.in);   int tatPrice1=number*price;   System.out.println("您需要支付"+tatPrice1+"元");   System.out.println("请支付");   money=scanner.nextInt();   }   public void pay(){   int tatPrice=number*price;   if(money<tatPrice){   System.out.println("您支付的金额不足");   }   else if(money==tatPrice){   System.out.println("正在帮您打印车票");   }   else{   int money1=money-tatPrice;   System.out.println("正在帮您打印车票并找您"+money1+"元");   }   } public static void main(String[] args) { subway s=new subway(); s.shuru(); s.shuru1(); s.price1(); s.pay(); }}

Answer 1

int tatPrice1=number*price;      // 这时的price 并未赋值(构造函数并未给price赋初值），所以默认为0
System.out.println("您需要支付"+tatPrice1+"元");   // tatPricel = number * 0 = 0