Java Utililty Methods Year

Calendar createCalendarAtBeginningOfYear(int year)
create Calendar At Beginning Of Year

final GregorianCalendar calendar = createUtcCalendar();
calendar.set(Calendar.YEAR, year);
calendar.set(Calendar.MONTH, 0);
calendar.set(Calendar.DAY_OF_MONTH, 1);
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
...

Integer currentYear()
current Year

GregorianCalendar gFechaActual = new GregorianCalendar();
return gFechaActual.get(GregorianCalendar.YEAR);

int daysInYear(int year)
days In Year

Calendar c = Calendar.getInstance();
c.set(Calendar.YEAR, year);
return c.getActualMaximum(Calendar.DAY_OF_YEAR);

double differenceInYears(final Calendar a, final Calendar b)
Calculates difference in years between to dates.

final long millisDif = a.getTimeInMillis() - b.getTimeInMillis();
return millisDif / MILLISECONDS_PER_YEAR;

int diffYears(Date day1, Date day2)
diff Years

Calendar cal = Calendar.getInstance();
cal.setTime(day1);
int startYear = cal.getWeekYear();
cal.clear();
cal.setTime(day2);
int endYear = cal.getWeekYear();
int diffyears = endYear - startYear;
return diffyears;
...

boolean IsInLeapYear(Date date1)
Indicates whether the year in the specified date is in a leap year.

GregorianCalendar cal = new GregorianCalendar();
cal.setTime(date1);
return cal.isLeapYear(cal.get(cal.YEAR));

boolean isLeapYear(int year)
is Leap Year

Calendar calendar = Calendar.getInstance();
calendar.set(year, 2, 1);
calendar.add(Calendar.DATE, -1);
if (calendar.get(Calendar.DAY_OF_MONTH) == 29) {
 return true;
} else {
 return false;

Date nextYears(int diff)
next Years

return add(new Date(), Calendar.YEAR, diff);

boolean sameYear(Date date1, Date date2)
same Year

if (date1 == null || date2 == null)
 throw new IllegalArgumentException("'date1' or 'date2' was null");
Calendar c1 = Calendar.getInstance();
c1.setTime(date1);
Calendar c2 = Calendar.getInstance();
c2.setTime(date2);
return c1.get(Calendar.YEAR) == c2.get(Calendar.YEAR);

String yearAndSeason(Date date)
year And Season

final Calendar cal = Calendar.getInstance();
cal.setTime(date);
return yearAndSeason(cal);