public static String join(String separator,float[] elements){
  if (elements == null || elements.length == 0) {
    return "";
  }
  List<Float> list=new ArrayList<Float>(elements.length);
  for (  Float element : elements) {
    list.add(element);
  }
  return join(separator,list);
}

public static String join ( String separator , float [ ] elements ) { if ( elements == null || elements . length == 0 ) { return "" ; } List < Float > list = new ArrayList < Float > ( elements . length ) ; for ( Float element : elements ) { list . add ( element ) ; } return join ( separator , list ) ; }
returns a string containing all float numbers concatenated by a specified separator .
