Java Utililty Methods Leap Year Check

List of utility methods to do Leap Year Check

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Description

The list of methods to do Leap Year Check are organized into topic(s).

Method

intgetLeapYear(int theyear)
get Leap Year 
return ((theyear % 4 == 0 && theyear % 100 != 0) || theyear % 400 == 0) ? 29 : 28;
intgetMonthOfYear(int dayOfYear, boolean leap)
Converts the number of elapsed days from beginning of the year to the corresponding month. 
int d = dayOfYear;
if (d < DAYS_JANUARY) {
    return 1;
if (leap) {
    d--;
if (d < DAYS_FEBRUARY) {
...
booleanisGregorianLeapYear(int gregorianYear)
is Gregorian Leap Year 
return (((gregorianYear % 4) == 0) && (((gregorianYear % 100) != 0) || ((gregorianYear % 400) == 0)));
booleanisGregorianLeapYear(int gregorianYear)
Returns whether the specified year is a leap year in the Gregorian calendar system. 
return (((gregorianYear % 4) == 0) && (((gregorianYear % 100) != 0) || ((gregorianYear % 400) == 0)));
booleanisJalaliLeapYear(int year)
is Jalali Leap Year 
int mod = (year + 11) % 33;
if ((mod != 32) && ((mod % 4) == 0)) {
    return true;
} else {
    return false;
booleanisJulianLeapYear(int normalizedJulianYear)
Returns whether the specified year is a leap year in the Julian calendar system. 
return (normalizedJulianYear % 4) == 0;
booleanisJulianLeapYear(int normalizedJulianYear)
is Julian Leap Year 
return (normalizedJulianYear % 4) == 0;
booleanisLeapYear(final int year)
Determines if the supplied year is a leap year 
boolean isLeapYear;
isLeapYear = year % 4 == 0;
isLeapYear = isLeapYear && year % 100 != 0;
return isLeapYear || year % 400 == 0;
booleanisLeapYear(final int year)
is Leap Year 
return ((year % 4) == 0) 
        && ((year < 1582) 
                || ((year % 100) != 0) 
                || ((year % 400) == 0));
booleanisLeapYear(int prolepticYear)
Checks if the year is a leap year, according to the ISO proleptic calendar system rules. 
return ((prolepticYear & 3) == 0) && ((prolepticYear % 100) != 0 || (prolepticYear % 400) == 0);