为什么输入存在的图书名也是执行异常？求大蛇指点
public class borrowBooks {
public static void main(String[] args) {
// 调用select方法
borrowBooks Select = new borrowBooks();
Select.select();
}
/**
*
*/
public void select() {
String[][] bookList=new String[][] {{"1","水浒传"},{"2","红楼梦"},{"3","三国演义"}};
//String[] bookList = new String[] {"java基础","水浒传","红楼梦","西游记","数据结构"};
System.out.println("输入命令：1-按照图书名称查询 2-按照图书编号查询");
Scanner input = new Scanner(System.in);
int num = input.nextInt();
try {
if(num==1) {
System.out.println("请输入您要查找的图书名称：");
Scanner input1 = new Scanner(System.in);
String bookName=input1.nextLine();
//一维数组
/* boolean t=Arrays.asList(bookList).contains(bookName);
if(t) {
System.out.println("您输入的图书"+bookName+"存在！");
}else {
throw new NobookException();
}*/
//二维数组
for(String[] bookname:bookList) {
for(String book:bookname) {
if(book.equals(bookName)) {
System.out.println("您输入的图书"+book+"存在！");
}else {
throw new NobookException();
}
}
}
}else if(num==2) {
System.out.println("请输入您要查找的图书编号");
Scanner input2 = new Scanner(System.in);
int bookNum=input2.nextInt();
if(bookNum>=1&&bookNum<=bookList.length) {
System.out.println("您查找的图书名称为"+bookList[bookNum-1]);
}else {
throw new NobookException();
}
}else {
throw new CommandException();
}
}catch (NobookException e) {
// TODO: handle exception
System.out.println("您输入的图书不存在！请重新输入");
select();
}catch (CommandException e) {
// TODO: handle exception
System.out.println("您输入的命令有误，请重新输入");
select();
}
}
}
