Java method to get the number of days between dates

This article illustrates how Java gets the number of days between dates. Share with you for your reference. The specific implementation method is as follows:

private int daysBetween(Date now, Date returnDate) {
  Calendar cNow = Calendar.getInstance();
  Calendar cReturnDate = Calendar.getInstance();
  cNow.setTime(now);
  cReturnDate.setTime(returnDate);
  setTimeToMidnight(cNow);
  setTimeToMidnight(cReturnDate);
  long todayMs = cNow.getTimeInMillis();
  long returnMs = cReturnDate.getTimeInMillis();
  long intervalMs = todayMs - returnMs;
  return millisecondsToDays(intervalMs);
}
private int millisecondsToDays(long intervalMs) {
  return (int) (intervalMs / (1000 * 86400));
}
private void setTimeToMidnight(Calendar calendar) {
  calendar.set(Calendar.HOUR_OF_DAY, 0);
  calendar.set(Calendar.MINUTE, 0);
  calendar.set(Calendar.SECOND, 0);
}

I hope this article has been helpful to your Java programming.