为什么我的这个代码没有捕捉到异常？
Main:
package com.imooc;
public class Main {
public static void main(String[] args){
Book book = new Book();
book.input();
}
}BookInputError:
package com.imooc;
class BookInputError extends Exception {
BookInputError()
{
super();
}
}Book:
package com.imooc;
import java.util.Scanner;
public class Book {
public void input () {
String name;
String number;
Scanner scanner = new Scanner(System.in);
name = scanner.nextLine();
number = scanner.nextLine();
try {
for (int i = 0; i <= number.length()-1; i++) {
if(number.charAt(i) < '0' && number.charAt(i) > '9') {
throw new BookInputError();
}
}
} catch (BookInputError bookInputError) {
System.out.println("input error");
}
System.out.println(name+number);
}
}输入实例：
8989 uuu
这个我觉得应该抛出异常，结果没有。
