public StringList plus(String... args){
  StringList newList=new StringList();
  newList.addAll(this);
  newList.addAll(Arrays.asList(args));
  return newList;
}

public StringList plus ( String ... args ) { StringList newList = new StringList ( ) ; newList . addAll ( this ) ; newList . addAll ( Arrays . asList ( args ) ) ; return newList ; }
add a list of strings .
