public DateTick(TickType tickType,Date date,String label,TextAnchor textAnchor,TextAnchor rotationAnchor,double angle){
  super(tickType,date.getTime(),label,textAnchor,rotationAnchor,angle);
  ParamChecks.nullNotPermitted(tickType,"tickType");
  this.date=date;
}

public DateTick ( TickType tickType , Date date , String label , TextAnchor textAnchor , TextAnchor rotationAnchor , double angle ) { super ( tickType , date . getTime ( ) , label , textAnchor , rotationAnchor , angle ) ; ParamChecks . nullNotPermitted ( tickType , "tickType" ) ; this . date = date ; }
creates a new date tick .
