Java program to find Armstrong number

This a a program to find  a Armstrong number in Java programming language

An Armstrong number of three digits is an integer such that the sum of the cubes of its digits is equal to the number itself. For example, 371 is an Armstrong number since 3**3 + 7**3 + 1**3 = 371.

Armstrong number

import java.util.*;
 
class ArmstrongNumber
{
   public static void main(String args[])
   {
      int n, sum = 0, temp, r;
 
      Scanner in = new Scanner(System.in);
      System.out.println("Enter a number to check if it is an armstrong number");     
      n = in.nextInt();
 
      temp = n;
 
      while( temp != 0 )
      {
         r = temp%10;
         sum = sum + r*r*r;
         temp = temp/10; 
      }
 
      if ( n == sum )
         System.out.println("Entered number is an armstrong number.");
      else
         System.out.println("Entered number is not an armstrong number.");         

   }
}

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