WAP to check no. is armstrong/not

/*WAP to check no. is armstrong/not*/

import java.lang.*;
class arms
{
 int num,i,rem,sum=0,status,b;
 arms(int a)
  {
   num=a;
  }
 void calculate()
    {
     i=num;
     while(i>0)
        {
         rem=i%10;
         b=rem*rem*rem;
         sum=sum+b;
         i=i/10;
         }
     if(sum==num)
     status=1;
     else
     status=0;
    }   
 void display()
   {
    if(status==1)
    System.out.println("ARMSTRONG"+sum);
    else if(status==0)
    System.out.println("not Armstrong"+sum);
   }
}
class demo_arms
{
 public static void main(String arg[])
   {
    arms a1=new arms(153);
    a1.calculate();
    a1.display();
   }
}