Armstrong number in java

A number that is equal to the sum of cube of its digits

Example:

123=(1*1*1)+(2*2*2)+(3*3*3)

123 != 36 is not equal so it is not Armstrong

371=(3*3*3)+(7*7*7)+(1*1*1)

371==371 is equal, so it is Armstrong

import java.util.Scanner;

public class Armstrong {

    public static void main(String[] arg){

        Scanner sc=new Scanner(System.in);

        System.out.println("Enter Number");

        int i=sc.nextInt();

        int j=i;

        int a,b=0;

        while(i>0){

            a=i%10;

            b=b+(a*a*a);

            i=i/10;

        }

        if(b==j){

            System.out.println(j+" is Armstrong number");

        }

        else{

            System.out.println(j+" is not Armstrong number");

        }

    }   

}

/*

Output1:

Enter Number

123

123 is not Armstrong number

Output2:

Enter Number

371

371 is Armstrong number

*/