Date difference

Calendar calendar1 = Calendar.getInstance();
				Calendar calendar2 = Calendar.getInstance();
				DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
				Date date = new Date();
				try {
					date = formatter.parse(trailLoginDate);
				} catch (Exception e) {
					// TODO: handle exception
				}
				calendar1.setTime(date);
				calendar2.setTime(new Date());
				long milliseconds1 = calendar1.getTimeInMillis();
				long milliseconds2 = calendar2.getTimeInMillis();
				long diff = milliseconds2 - milliseconds1;
				long diffDays = diff / (24 * 60 * 60 * 1000);
				days = (int)diffDays;