Java - java resolver ayudaaa

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

public class Digitos {

    public static void main(String[] args) {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        Integer digito = -1;

        while (digito != 0) {

            try {

                System.out.println("Ingrese un numero entre 0 y 10000: ");

                digito = Integer.parseInt(br.readLine());

                System.out.println("El número " + digito + " tiene " + digito.toString().length() + " digitos");

            } catch (IOException | NumberFormatException ex) {

                System.out.println("Error de lectura\n");

            }

        }

    }

}

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

int digito = -1;

while (digito != 0) {

    try {

        System.out.println("Ingrese un numero entre 0 y 10000: ");

        String linea = br.readLine();

        digito = Integer.parseInt(linea);

        System.out.println("El número " + digito + " tiene " + linea.length() + " digitos");

    } catch (IOException | NumberFormatException ex) {

        System.out.println("Error de lectura\n");

    }

}

linea.toCharArray().length