org.jfree.date

Class EasterSundayRule

Implemented Interfaces:
Cloneable

public class EasterSundayRule
extends AnnualDateRule

An annual date rule for Easter (Sunday). The algorithm used here was obtained from a Calendar FAQ which can be found at:

http://www.tondering.dk/claus/calendar.html.

It is based on an algorithm by Oudin (1940) and quoted in "Explanatory Supplement to the Astronomical Almanac", P. Kenneth Seidelmann, editor.

Author:
David Gilbert

Constructor Summary

EasterSundayRule()
Default constructor.

Method Summary

SerialDate
getDate(int year)
Returns the date of Easter Sunday for the given year.

Methods inherited from class org.jfree.date.AnnualDateRule

clone, getDate

Constructor Details

EasterSundayRule

public EasterSundayRule()
Default constructor.

Method Details

getDate

public SerialDate getDate(int year)
Returns the date of Easter Sunday for the given year. See the class description for the source of the algorithm.

This method supports the AnnualDateRule interface.

Overrides:
getDate in interface AnnualDateRule
Parameters:
year - the year to check.
Returns:
the date of Easter Sunday for the given year.