public PlaLineIntAlist(Collection<PlaLineInt> p_list){
  int list_len=p_list.size();
  a_list=new ArrayList<PlaLineInt>(list_len);
  addAll(p_list);
}

public PlaLineIntAlist ( Collection < PlaLineInt > p_list ) { int list_len = p_list . size ( ) ; a_list = new ArrayList < PlaLineInt > ( list_len ) ; addAll ( p_list ) ; }
create a new instance by copying the collection to this alist
