Javaで時間を無視して日付を比較する方法?

DateTime first = ...;
DateTime second = ...;

LocalDate firstDate = first.toLocalDate();
LocalDate secondDate = second.toLocalDate();

return firstDate.compareTo(secondDate);

return DateTimeComparator.getDateOnlyInstance().compare(first, second);

Calendar firstCalendar = Calendar.getInstance();
firstCalendar.setTime(first);
firstCalendar.set(Calendar.HOUR_OF_DAY, 0);
firstCalendar.set(Calendar.MINUTE, 0);
firstCalendar.set(Calendar.SECOND, 0);
firstCalendar.set(Calendar.MILLISECOND, 0);

Calendar secondCalendar = ... // Do the same for second date

return firstCalendar.compareTo(secondCalendar);