@Override public void add(int location,E object){
  insertElementAt(object,location);
}

@ Override public void add ( int location , E object ) { insertElementAt ( object , location ) ; }
adds the specified object into this vector at the specified location . the object is inserted before any element with the same or a higher index increasing their index by 1 . if the location is equal to the size of this vector , the object is added at the end .
