public boolean removeMiddleOfLastThree(){
  if (!hasThree())   return false;
  int pos=points.size();
  points.remove(pos - 2);
  return true;
}

public boolean removeMiddleOfLastThree ( ) { if ( ! hasThree ( ) ) return false ; int pos = points . size ( ) ; points . remove ( pos - 2 ) ; return true ; }
returns middle of last three . returns true on success ; false otherwise .
