Program to find frequency of every digit in a number

Write a program to input a number. Count and print the frequency of each digit present in that number. The output should be given as:
Sample Input: 44514621
Sample Output:=====================
Digit             Frequency
=====================
1                         2
2                         1
4                         3
5                         1
6                         1

import java.io.*;

class Digit_Freq

{

    public static void main(String args[])throws IOException

    {

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

        System.out.print("Enter any number : ");

        int n = Integer.parseInt(br.readLine());

 

        int freq[]=new int[10]; //array for storing frequency of all digits

 

        for(int i=0; i<10; i++)

            {

                freq[i]=0; //intializing the count of every digit with '0'

            }

 

        /*Note: Frequency of digit '0' is stored in freq[0], frequency of '1' in freq[1] and so on*/

 

        System.out.println("Output:");

        System.out.println("===================="); //this is just for styling the look of the output

        System.out.println("Digit\tFrequency");

        System.out.println("====================");

 

        int d;

        while(n>0)

        {

            d=n%10; //extracting digit from the end

            freq[d]++; //increasing the frequency of that digit.

            n=n/10;

        }

             

        for(int i=0; i<10; i++)

            {

                if(freq[i]!=0) //printing only those digits whose count is not '0'

                    System.out.println("   "+i+"\t    "+freq[i]);

            }

        }

    }




Output:

Enter any number : 937825770

Output:
=====================
Digit             Frequency
=====================
0                          1
2                          1
3                          1
5                          1
7                          3
8                          1
9                          1