convert string date to date type concode_field_sep String SHORT_FORMAT concode_elem_sep String FULL_FORMAT concode_elem_sep String NORMAL_DAY_OF_WEEK_FORMAT concode_elem_sep String NORMAL_FORMAT concode_field_sep String getDateTime concode_elem_sep Date getDateFromDatePicket concode_elem_sep String getStringTimeFromTime concode_elem_sep String getStringTimeFromTimePicker concode_elem_sep boolean isAfter concode_elem_sep String dateToString concode_elem_sep boolean isBefore