Java Utililty Methods Calendar Different

List of utility methods to do Calendar Different

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Description

The list of methods to do Calendar Different are organized into topic(s).

Method

longgetDifferenceInSeconds(Calendar calendarStart, Calendar calendarEnd)
Returns the difference in seconds between two Calendar objects. 
return (calendarEnd.getTimeInMillis() - calendarStart.getTimeInMillis()) / 1000;
intgetDiffPartialYears(Date date, GregorianCalendar b)
get Diff Partial Years 
GregorianCalendar a = new GregorianCalendar();
a.setTime(date);
int diff = b.get(GregorianCalendar.YEAR) - a.get(GregorianCalendar.YEAR);
if (diff == 0 && countDaysBetween(a.getTime(), b.getTime()) > 0) {
    return 1;
return diff;
DategetDiffTargetDate(Calendar cal, int diffDay)
get Diff Target Date 
if (null == cal) {
    cal = Calendar.getInstance();
cal.add(Calendar.DATE, diffDay);
return cal.getTime();
floatgetMillisDiff(long lhs, long rhs, int gregorianCalendarUnits)
get Millis Diff 
long millis = lhs - rhs;
switch (gregorianCalendarUnits) {
case Calendar.MILLISECOND:
    return millis;
case Calendar.SECOND:
    return (float) (millis / SECOND);
case Calendar.MINUTE:
    return (float) (millis / MINUTE);
...
intgetMonthDiff(Calendar c1, Calendar c2)
get Month Diff 
int mon1 = c1.get(Calendar.MONTH);
int mon2 = c2.get(Calendar.MONTH);
int y1 = c1.get(Calendar.YEAR);
int y2 = c2.get(Calendar.YEAR);
return (y2 - y1) * 12 + mon2 - mon1;
intgetMonthsDifference(Calendar date1, Calendar date2)
get Months Difference 
int m1 = date1.get(Calendar.YEAR) * 12 + date1.get(Calendar.MONTH);
int m2 = date2.get(Calendar.YEAR) * 12 + date2.get(Calendar.MONTH);
return m2 - m1;
DategetTargetDate(Calendar reqCal, int diffMon, int proxyDay)
get Target Date 
Calendar cal = null == reqCal ? Calendar.getInstance() : reqCal;
cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) + diffMon);
cal.set(Calendar.DATE, proxyDay);
Date date = cal.getTime();
return date;
longgetTimeDifference(String unit, Calendar start, Calendar end)
get Time Difference 
long diff = end.getTimeInMillis() - start.getTimeInMillis();
switch (functions.get(unit)) {
case 20: 
    diff = diff / ONE_MINUTE;
    break;
case 21: 
    diff = diff / ONE_HOUR;
    break;
...
doublegetTimeDiffSecond(Calendar first, Calendar second)
get Time Diff Second 
if (first == null || second == null)
    return 0;
final double millis = second.getTimeInMillis() - first.getTimeInMillis();
return Math.abs(millis / 1000);
intgetWeekDifference(Calendar before, Calendar after)
get Week Difference 
int diff = after.get(Calendar.WEEK_OF_YEAR) - before.get(Calendar.WEEK_OF_YEAR);
diff = diff + (before.getMaximum(Calendar.WEEK_OF_YEAR)
        * (after.get(Calendar.YEAR) - before.get(Calendar.YEAR)));
return diff;