自己写的，仅供参考

package booktest;

import java.util.Scanner;

public class book {

public static void main(String[] args) {

// TODO Auto-generated method stub

boolean n = true;

String[] bookname = new String[] {"高数","数据结构"};

while(n)

{

try {

Scanner input = new Scanner(System.in);

System.out.println("输入命令：1-按照名称查找图书；2-按照序号查找图书");

int number = input.nextInt();

if(number == 1){

System.out.println("输入图书名称：");

Scanner input1 = new Scanner(System.in);

String a = input1.nextLine();

for(String b:bookname) {

if(b.contains(a)) {

System.out.println("book:"+ a);

break;

}

else {

System.out.println("图书不存在！");

break;

}

}

}

else if(number ==2){

System.out.println("输入图书序号：");

int c = input.nextInt();

if(c == 0) {

System.out.println("book:" + bookname[c]);

break;

}

else if(c == 1) {

System.out.println("book:" + bookname[1]);

break;

}

else {

System.out.println("图书不存在！");

}

}

}catch(Exception e){

System.out.println("命令输入错误！请根据提示输入数字命令！");

continue;

}

}

}

}