import java.awt.TexturePaint;

import java.util.InputMismatchException;

import java.util.Scanner;

public class error extends Exception {

String maths="高数";

String linux="操作系统";

     public void test(){

    for(;;) {

    try{ 

System.out.println("1.按名称查找。2.按序号查找");

Scanner imput=new Scanner(System.in);

        int num=imput.nextInt();

if(num==1){

System.out.println("请输入名称：");

Scanner book=new Scanner(System.in);

String boo=book.next();

if(boo.equals("高数")){

System.out.println("书籍为高数");

}

}

if(num==2){

}

    }catch (InputMismatchException e) {

System.out.println("请输入1或者2");

continue;

    }

    break;

    }

     }

public static void main(String[] args) {

error i=new error();

i.test();

}

}