package try_catch;

import java.util.Scanner;

public class TryCatchPractice2 {

//在類開始聲明，則其他方法都能調用

Scanner in=new Scanner(System.in);

NoBookException NoB=new NoBookException();

String[] books={"語文","數學","英語"};

static TryCatchPractice2 trycat=new TryCatchPractice2();

//主函數

public static void main(String[]args) throws Exception{trycat.InputClassException();

}

//命令錯誤

public void InputClassException()throws Exception{

try{

System.out.println("歡迎光臨本圖書管理系統");

System.out.println("1.書名查詢。2.序號查詢");

int a=in.nextInt();

switch(a){

case 1://查找圖書

trycat.findBooks();

break;

case 2://查找序號

trycat.findBooksNum();

break;

default:

throw new NoBookException("錯誤命令，請輸入整數1