Fibonacci series program in Java

class Fibonacci{
 public static void main(String args[]){
  int num = Integer.parseInt(args[0]); //taking no. as command line
  argument.
   System.out.println("*****Fibonacci Series*****");
  int f1, f2=0, f3=1;
  for(int i=1;i<=num;i++){
   System.out.print(" "+f3+" ");
   f1 = f2;
   f2 = f3;
   f3 = f1 + f2;
  }
 }
}