confused with int Assignments in Java -

i trying work on armstrong number, here code

public class newarmstrongnumber {  public static void main(string[] args) {      int num = 153,armnum=0;     while(num>0){         int temp = num%10;         armnum = armnum+(temp*temp*temp);          num = num/10;      }     system.out.println(num==armnum);  } 

}

the result getting false,may know why?

num decreasing /10 each time, , loop exits when num 0.

armnum potentially increasing each time goes through loop.

so unless armnum 0, false.