用Java判断输入的数是几位数

1、package com.liushuo;

import java.util.Scanner;

public class Test12 {

public static void main(String[] args) {

// 从键盘输入一个0~99999之间的任意数，判断输入的数是几位数

Scanner input = new Scanner(System.in);

int number = input.nextInt();

int count = 0;

if (number < 0 || number > 999999)

System.out.println("输入错误");

else {

while (number > 0) {

number = number / 10;

count++;

}

System.out.println("输入的数是" + count + "位数");

}

}

}