code: public Calendar getCalendar() {
  		Date date = getDate();
  		if (date == null) {
  			return null;
  		}
  		Calendar calendar = Calendar.getInstance();
  		calendar.setTime(date);
  		return calendar;
  	}
docs: Returns the calendar. If the JDateChooser is started with a null date (or
  null calendar) and no date was set by the user, null is returned.
  
  @return the current calendar