在IDEA里运行如下代码，出现下面的问题Exception in thread "main" exp_06.P5.NumberException，请问该怎么解决

package exp_06.P5;
public class BD{
   String toto(String ba) throws NumberException {
        int sum=0;
        for(int i=ba.length()-1, j=0;i>=0;i--,j++)
        {
            if(ba.charAt(i)=='0'||ba.charAt(i)=='1')
                sum += (int)(ba.charAt(i)-48)*Math.pow(2, j);
            else {
                throw new NumberException(ba);
            }
        }
       String s = Integer.toString(sum);
       return s;
    }
}

package exp_06.P5;

public class NumberException extends Exception {
        String num;
        public NumberException(String number) {
            System.out.printf("%s不是二进制数",number);
        }

}

package exp_06.P5;
import java.util.*;
//throws NumberException
public class BtoD {
    public static void main(String[] args) throws NumberException{
        Scanner reader = new Scanner(System.in);
        System.out.printf("请输入二进制数");
        String B = reader.nextLine();
        BD bd = new BD();
        String s= bd.toto(B);
        System.out.printf("转换为十进制数为%s",s);
    }
}

将自定义异常类按如下修改即可

class NumberException extends Exception {
    public NumberException(String number) {
        super(number + "不是二进制数");
    }
}

就是你自己抛出的异常啊。有啥问题