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

intdateDiff(java.util.Date a, java.util.Date b)
Date diff. 
int tempDifference = 0;
int difference = 0;
Calendar earlier = Calendar.getInstance();
Calendar later = Calendar.getInstance();
if (a.compareTo(b) < 0) {
    earlier.setTime(a);
    later.setTime(b);
} else {
...
longdateDiff(String startDate, String endDate)
date Diff 
SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd");
GregorianCalendar endGC = new GregorianCalendar();
long times, days1 = 0l;
try {
    times = sd.parse(endDate).getTime() - sd.parse(startDate).getTime();
    long days = times / (1000 * 24 * 60 * 60);
    days1 = (days / 7) * 5;
    long days2 = days % 7;
...
long[]dateDiff(String startTime, String endTime, String format)
date Diff 
SimpleDateFormat sd = new SimpleDateFormat(format);
long nd = 86400000L;
long nh = 3600000L;
long nm = 60000L;
long ns = 1000L;
long[] date = new long[4];
try {
    long diff = sd.parse(endTime).getTime() - sd.parse(startTime).getTime();
...
intDateDiff(String strDateBegin, String strDateEnd, int iType)
Date Diff 
Calendar calBegin = parseDateTime(strDateBegin);
Calendar calEnd = parseDateTime(strDateEnd);
long lBegin = calBegin.getTimeInMillis();
long lEnd = calEnd.getTimeInMillis();
int ss = (int) ((lBegin - lEnd) / 1000L);
int min = ss / 60;
int hour = min / 60;
int day = hour / 24;
...
longdateDiffer(String time1, String time2, String formatStr)
date Differ 
SimpleDateFormat sp = new SimpleDateFormat(formatStr);
Date date1 = sp.parse(time1);
Date date2 = sp.parse(time2);
long differ = Math.abs(date1.getTime() - date2.getTime());
return differ;
floatdateDiffInDays(Date dateStart, Date dateEnd)
computes (dateEnd - dateStart) in days 
return ((float) (dateEnd.getTime() - dateStart.getTime())) / ONE_DAY_IN_MILLIS;
floatdateDiffInDaysIgnoreTime(Date dateStart, Date dateEnd)
date Diff In Days Ignore Time 
return dateDiffInDays(getMidnight(dateStart), getMidnight(dateEnd));
longdateDiffMonth(Date d1, Date d2)
date Diff Month 
Calendar calendar = Calendar.getInstance();
calendar.setTime(d1);
int y1 = calendar.get(Calendar.YEAR);
int m1 = calendar.get(Calendar.MONTH);
calendar.setTime(d2);
int y2 = calendar.get(Calendar.YEAR);
int m2 = calendar.get(Calendar.MONTH);
return (y1 - y2) * 12 + m1 - m2;
...
longdateDiffWithNow(Calendar sDate)
date Diff With Now 
Date now = Calendar.getInstance().getTime();
long timeDiff = now.getTime() - sDate.getTimeInMillis();
return timeDiff;
longdayDiff(Date a, Date b)
day Diff 
if (a == null || b == null) {
    return 0;
long diff = a.getTime() - b.getTime();
if (diff >= 0) {
    diff = diff + HOUR_IN_MILLIS;
} else {
    diff = diff - HOUR_IN_MILLIS;
...