code: public synchronized boolean isTooOldForDiff() {
          if (isEmpty()) {
              return true;
          }
          try {
              final String dateMaxDiff_str = new SimpleDateFormat("yyyy.MM.dd__").format(new Date()) + Const.TIME_MAX_AGE_FOR_DIFF + ":00:00";
              final Date dateMaxDiff = new SimpleDateFormat("yyyy.MM.dd__HH:mm:ss").parse(dateMaxDiff_str);
              final Date dateFilmliste = getAgeAsDate();
              if (dateFilmliste != null) {
                  return dateFilmliste.getTime() < dateMaxDiff.getTime();
              }
          } catch (Exception ignored) {
          }
          return true;
      }
docs: Check if Filmlist is too old for using a diff list.
  
  @return true if empty or too old.