Java Utililty Methods Date Difference

List of utility methods to do Date Difference

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Description

The list of methods to do Date Difference are organized into topic(s).

Method

longdayDiff(Date date1, Date date2)
day Diff 
return (date2.getTime() - date1.getTime()) / 86400000;
intdayDiff(Date first, Date second)
day Diff 
long msPerDay = 1000 * 60 * 60 * 24;
long diff = (first.getTime() / msPerDay) - (second.getTime() / msPerDay);
Long convertLong = new Long(diff);
return convertLong.intValue();
longdayDiffByStartOfDay(Date a, Date b)
day Diff By Start Of Day 
a = startOfDay(a);
b = startOfDay(b);
return dayDiff(a, b);
longdaysDiff(Date d1, Date d2)
days Diff 
long t1 = d1.getTime();
long t2 = d2.getTime();
return (t1 - t2) / (1000 * 60 * 60 * 24);
longdiff(Date d1, Date d2)
Return the millisecond difference between two Dates. 
return d1.getTime() - d2.getTime();
intdiff(Date date1, Date date2)
diff 
Calendar c1 = Calendar.getInstance();
Calendar c2 = Calendar.getInstance();
c1.setTime(date1);
c2.setTime(date2);
int diffDay = 0;
if (c1.before(c2)) {
    diffDay = countDiffDay(c1, c2);
} else {
...
intdiff(Date date1, Date date2)
diff 
long day = 24L * 60L * 60L * 1000L;
String str1 = date2Str(date1, "yyyy-MM-dd");
date1 = str2Date(str1, "yyyy-MM-dd");
String str2 = date2Str(date2, "yyyy-MM-dd");
date2 = str2Date(str2, "yyyy-MM-dd");
return (int) (((date2.getTime() - date1.getTime()) / day));
longdiff(Date endDate, Date startDate)
diff 
long endTime = getMillis(endDate);
long startTime = getMillis(startDate);
return endTime - startTime;
longdiff(Date sDate, Date fDate)
diff 
long timeDiff = fDate.getTime() - sDate.getTime();
return timeDiff;
longdiff(Date subtrahend, Date minuend, long diffField)
diff 
long diff = minuend.getTime() - subtrahend.getTime();
return diff / diffField;