Class CopticCalendar

java.lang.Object

org.episteme.social.history.calendars.AlternateCalendar

org.episteme.social.history.calendars.SevenDaysWeek

org.episteme.social.history.calendars.MonthDayYear

org.episteme.social.history.calendars.GregorianCalendar

org.episteme.social.history.calendars.JulianCalendar

org.episteme.social.history.calendars.CopticCalendar

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

EthiopicCalendar

public class CopticCalendar
extends JulianCalendar

Implementation of the Coptic calendar. The Coptic calendar is used by the Coptic Orthodox Church and is based on the ancient Egyptian calendar with leap year rules.

Key features:

• Epoch: August 29, 284 CE (Julian) - Era of Martyrs
• 13 months: 12 of 30 days + Nasie (5 or 6 days)
• Leap year every 4 years (without century exception)

* @version 2.0

Since:

1.0

Author:

Silvere Martin-Michiellot, Gemini AI (Google DeepMind)

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static long	EPOCH	The RD number of the Coptic epoch (August 29, 284 CE Julian).

Fields inherited from class MonthDayYear

day, month, year

Fields inherited from class SevenDaysWeek

DAY_NAMES, FRIDAY, MONDAY, SATURDAY, SUNDAY, THURSDAY, TUESDAY, WEDNESDAY

Fields inherited from class AlternateCalendar

JD_EPOCH, rd, unicode

Constructor Summary

Constructors

Constructor	Description
CopticCalendar()	Creates a new CopticCalendar object.
CopticCalendar(int i, int j, int k)	Creates a new CopticCalendar object.
CopticCalendar(long l)	Creates a new CopticCalendar object.
CopticCalendar(AlternateCalendar altcalendar)	Creates a new CopticCalendar object.

Method Summary

Modifier and Type	Method	Description
Enumeration<String>	getMonths()	Returns an enumeration of all Coptic month names.
protected String	getSuffix()	Returns the era suffix for Coptic years (empty).
static boolean	isLeapYear(int i)	Checks if the given year is a leap year in the Coptic calendar.
static void	main(String[] args)	Main method for testing the Coptic calendar implementation.
protected String	monthName()	Returns the name of the current month.
protected void	recomputeFromRD()	Recomputes the month, day, and year from the current Rata Die number.
protected void	recomputeRD()	Recomputes the Rata Die number from the current month, day, and year.
String	toString()	Returns a string representation of the Coptic date.

Methods inherited from class JulianCalendar

set

Methods inherited from class GregorianCalendar

dayNumber, daysLeft

Methods inherited from class MonthDayYear

getDay, getMonth, getYear, set

Methods inherited from class SevenDaysWeek

kDayAfter, kDayBefore, kDayNearest, kDayOnOrAfter, kDayOnOrBefore, nthKDay, weekDay, weekDayName

Methods inherited from class AlternateCalendar

add, amod, difference, difference, floorDiv, fromJD, isAfter, isBefore, mod, mod, subtract, toJD, toJD, toRD

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

EPOCH

public static long EPOCH

The RD number of the Coptic epoch (August 29, 284 CE Julian).

Constructor Details

CopticCalendar

public CopticCalendar()

Creates a new CopticCalendar object.

CopticCalendar

public CopticCalendar(long l)

Creates a new CopticCalendar object.

Parameters:

l - the Rata Die number.

CopticCalendar

public CopticCalendar(AlternateCalendar altcalendar)

Creates a new CopticCalendar object.

Parameters:

altcalendar - another calendar to initialize from.

CopticCalendar

public CopticCalendar(int i,
 int j,
 int k)

Creates a new CopticCalendar object.

Parameters:

i - the month (1-13).

j - the day.

k - the year.

Method Details

isLeapYear

public static boolean isLeapYear(int i)

Checks if the given year is a leap year in the Coptic calendar.

Parameters:

i - the year to check.

Returns:

true if it is a leap year.

recomputeRD

protected void recomputeRD()

Recomputes the Rata Die number from the current month, day, and year.

Overrides:

recomputeRD in class JulianCalendar

recomputeFromRD

protected void recomputeFromRD()

Recomputes the month, day, and year from the current Rata Die number.

Overrides:

recomputeFromRD in class JulianCalendar

monthName

protected String monthName()

Returns the name of the current month.

Overrides:

monthName in class GregorianCalendar

Returns:

the month name string.

getSuffix

protected String getSuffix()

Returns the era suffix for Coptic years (empty).

Overrides:

getSuffix in class JulianCalendar

Returns:

an empty string.

getMonths

public Enumeration<String> getMonths()

Returns an enumeration of all Coptic month names.

Overrides:

getMonths in class GregorianCalendar

Returns:

enumeration of month names.

toString

public String toString()

Returns a string representation of the Coptic date.

Overrides:

toString in class JulianCalendar

Returns:

the date string.

main

public static void main(String[] args)

Main method for testing the Coptic calendar implementation.

Parameters:

args - command line arguments.