armstrong no in java

import java.util.Scanner;
public class p4
{

    public static void main(String args[])
    {
        Scanner s=new Scanner(System.in);
        int i=0,j=0,count,mul=1,sum=0,b=0,a=0;
        System.out.println("ARMSTRONG numbers");
        for(i=10;i<=1000;i++)
        {
            a=i;
            sum=0;
            mul=1;
            b=0;
            count=0;
            while(a!=0)
            {
                count++;
                a=a/10;
            }
            a=i;
            while(a!=0)
            {
                b=a%10;
                mul=1;
                for(j=0;j<count;j++)
                {
                    mul=mul*b;
                }
                sum=sum+mul;
                a=a/10;
            }

            if(i==sum)
            {
                System.out.println("=> "+i);
            }
        }
    }
}