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);

????}


}

輸入實例：

8989
uuu

這個我覺得應該拋出異常，結果沒有。