Check armstrong number or not

package javaprgms;

import java.util.Scanner;

public class ArmstrongNumber{

            public static void main(String args[])

            {

                        int n, sum = 0, temp, r;

                        @SuppressWarnings("resource")

                        Scanner in = new Scanner(System.in);

                        System.out.println("Enter a number to check if it is an Armstrong number or not");    

                        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(n+" is an Armstrong number.");

                        else

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

            }

}

Output:

Enter a number to check if it is an Armstrong number or not

153

153is an Armstrong number.