org.stellarium.astro
Class JulianDay

java.lang.Object
  org.stellarium.astro.JulianDay

public class JulianDay
extends java.lang.Object

General Calendar Functions

Nested Class Summary

(package private) class	JulianDay.LNDate
(package private) static class	JulianDay.TimeT
(package private) static class	JulianDay.TM

Field Summary

static double

J2000

Constructor Summary

JulianDay()

Method Summary

(package private) static java.util.Date	getDate(double jd) Calculate the date from the Julian day.
(package private) int	getDayOfWeek(java.util.Date date) Calculate the day of the week.
(package private) static double	getJulianDay(java.util.Date cdate)
static double	getJulianFromSys() Calculate julian day from system time.
(package private) static java.util.Date	getLnDateFromSys() Calculate gmt date from system date.
static java.util.Date	getTimeFromJulian(double jd) Calculate time_t from julian day.
static java.util.Date	getTmFromJulian(double jd) Calculate tm struct from julian day

Methods inherited from class java.lang.Object

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

Field Detail

J2000

public static final double J2000

See Also:

Constant Field Values

Constructor Detail

JulianDay

public JulianDay()

Method Detail

getJulianDay

static double getJulianDay(java.util.Date cdate)

getDayOfWeek

int getDayOfWeek(java.util.Date date)

Calculate the day of the week.

Parameters:

date - A given date.

Returns:

0 = Sunday .. 6 = Saturday

getTmFromJulian

public static java.util.Date getTmFromJulian(double jd)

Calculate tm struct from julian day

Parameters:

jd - Julian Day

Returns:

A TM structure that represents the Julian Day.

getDate

static java.util.Date getDate(double jd)

Calculate the date from the Julian day.

Parameters:

jd - Julian day, date Pointer to new calendar date.

getJulianFromSys

public static double getJulianFromSys()

Calculate julian day from system time.

getLnDateFromSys

static java.util.Date getLnDateFromSys()

Calculate gmt date from system date.

Returns:

Stored date.

getTimeFromJulian

public static java.util.Date getTimeFromJulian(double jd)

Calculate time_t from julian day.

Parameters:

jd - Julian Day