为什么加了个while(bl)和try catch就可以重新输了？输入的时候图书名称打错
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package com.imooc;import java.util.Scanner;public class Book { static String[] name={new String("大学"),new String("中庸"), new String("论语"),new String("孟子")}; static int[] num={1,2,3,4}; public static void main(String[] args) { System.out.println("1-按照名称查找图书；2-按照序号查找图书"); Scanner input=new Scanner(System.in); int score=input.nextInt(); boolean bl=true; while(bl){ try{ while(score==1){ System.out.println("输入图书名称"); String bookname = input.next(); int i=0; if(bookname.equals(name)){ System.out.println("book:"+name); bl=false; i++; break; } } while(score==2){ System.out.println("输入图书序号"); int booknum=input.nextInt(); if(booknum==num[booknum-1]){ System.out.println("book:"+name[booknum-1]); bl=false; break; } } }catch(Exception e){ System.out.println("图书不存在，请重新输入"); } } }} |
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