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

intcountDiffDay(Calendar c1, Calendar c2)
count Diff Day 
int returnInt = 0;
while (!c1.after(c2)) {
    c1.add(Calendar.DAY_OF_MONTH, 1);
    returnInt++;
if (returnInt > 0) {
    returnInt = returnInt - 1;
return (returnInt);
intcountDiffMonth(Calendar cBegin, Calendar cEnd, boolean isRoundUp)
count Diff Month 
int diffMonth = 0;
int dBegin = 0;
int dEnd = 0;
int mBegin = 0;
int mEnd = 0;
try {
    dBegin = cBegin.get(Calendar.DATE);
    dEnd = cEnd.get(Calendar.DATE);
...
intdatediff(Calendar c1, Calendar c2)
datediff 
if (c1 == null || c2 == null)
    return -1;
long r = c1.getTimeInMillis() - c2.getTimeInMillis();
r = r / (24 * 60 * 60 * 1000);
return (int) r;
intdateDiff(int type, Calendar fromDate, Calendar toDate)
Get the difference of a specific calendar field for 2 calendar instances. 
boolean future = toDate.after(fromDate);
int diff = 0;
long savedDate = fromDate.getTimeInMillis();
while ((future && !fromDate.after(toDate)) || (!future && !fromDate.before(toDate))) {
    savedDate = fromDate.getTimeInMillis();
    fromDate.add(type, future ? 1 : -1);
    diff++;
diff--;
fromDate.setTimeInMillis(savedDate);
return diff;
intdateDiff(int type, Calendar fromDate, Calendar toDate, boolean future)
date Diff 
int diff = 0;
long savedDate = fromDate.getTimeInMillis();
while ((future && !fromDate.after(toDate)) || (!future && !fromDate.before(toDate))) {
    savedDate = fromDate.getTimeInMillis();
    fromDate.add(type, future ? 1 : -1);
    diff++;
diff--;
...
intdateDiff(int type, Calendar fromDate, Calendar toDate, boolean future)
date Diff 
int year = Calendar.YEAR;
int fromYear = fromDate.get(year);
int toYear = toDate.get(year);
if (Math.abs(fromYear - toYear) > MAX_YEARS) {
    toDate.set(year, fromYear + (future ? MAX_YEARS : -MAX_YEARS));
int diff = 0;
long savedDate = fromDate.getTimeInMillis();
...
intdateDiff(long dateUtilitiesUnitField, Calendar firstDate, Calendar secondDate)
Calculate the difference, in DateUtilitities field units, for any two Calendar objects 
long diff = Math.abs(firstDate.getTimeInMillis() - secondDate.getTimeInMillis());
double diffAmt = (double) diff / dateUtilitiesUnitField;
return (int) Math.round(diffAmt);
StringdateDifferenceInMin(Calendar startDate, Calendar stopDate)
This method return the min as string between two dates. 
return "" + ((stopDate.getTimeInMillis() - startDate.getTimeInMillis())) / (1000 * 60);
longdiff(Calendar value1, Calendar value2, int millisInCondition)
diff 
long result = 0;
long v1 = (value1.getTimeInMillis() + value1.get(Calendar.ZONE_OFFSET)) / millisInCondition;
long v2 = (value2.getTimeInMillis() + value2.get(Calendar.ZONE_OFFSET)) / millisInCondition;
result = v2 - v1;
return result;
CalendardiffDay(Calendar calendar, int day)
diff Day 
return diff(calendar, 0, 0, day, 0, 0, 0, 0);