Java program to find the difference between greatest and smallest digits presents in the number

Write a java program to accept an integer number to find out and print the difference between greatest and smallest digits presents in the number .

import java.util.*;
class Difference
{
    public static void main(String arr[]) 
    {
        Scanner sc=new Scanner(System.in);
        int min=9,max=0,number,digit,diff;
        System.out.println("Enter any Integer Number : ");
        number=sc.nextInt();
        while(number>0)
        {
            digit=number%10;
            if(min>digit)
            {
                min=digit;
            }
            if(max<digit)
            {
                max=digit;
            }
            number=number/10;
        }
        diff=max-min;
        System.out.println("Greatest  Digit : "+max);
        System.out.println("Smallest  Digit : "+min);
        System.out.println("Difference  Between Greatest and Smallest  Digit : "+diff);        
    }
}

Enter any Integer Number : 

23478

Greatest  Digit : 8

Smallest  Digit : 2

Difference  Between Greatest and Smallest  Digit : 6