private void resetClassOpen() {
   FILE_WEEK = CLASS_TIME.get(Calendar.WEEK_OF_YEAR) - OPEN_TIME.get(Calendar.WEEK_OF_YEAR) + 1;
   String str = helper.getClassOpen();
   String[] arr = str.split("-");
   OPEN_TIME.set(Calendar.YEAR, Integer.parseInt(arr[0]));
   OPEN_TIME.set(Calendar.MONTH, Integer.parseInt(arr[1]));
   OPEN_TIME.set(Calendar.DAY_OF_MONTH, Integer.parseInt(arr[2]));
 }