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	== What is a date ? ==		== What is a date ? ==

	A date is an instance of [{{~~PathCurrentJavaDoc~~}}/fr/cnes/sirius/patrius/time/AbsoluteDate.html AbsoluteDate]. Two important things are necessary to know:		A date is an instance of [{{JavaDoc4.1}}/fr/cnes/sirius/patrius/time/AbsoluteDate.html AbsoluteDate]. Two important things are necessary to know:
	* It is an immutable object, meaning, once it is created, it is no more possible to change it. If you want, for example to shift it, you will have to create a new date, eventually starting from the initial one using the <font color=#4169E1>shiftedBy()</font> method;		* It is an immutable object, meaning, once it is created, it is no more possible to change it. If you want, for example to shift it, you will have to create a new date, eventually starting from the initial one using the <font color=#4169E1>shiftedBy()</font> method;
	* It is allways "stored" in the <font color=#FF8C00 title="Temps Atomique International>TAI</font> time scale (but may be built and/or expressed in other formats). Time scales are available with a factory ([{{~~PathCurrentJavaDoc~~}}/fr/cnes/sirius/patrius/time/TimeScalesFactory.html TimeScalesFactory].getXXX()). But, be careful that it is mandatory to use a <font color=#556B2F>'''PATRIUS'''</font> data set as <font color=#FF8C00 title="Coordinated universal time>UTC</font>/<font color=#FF8C00 title="Temps Atomique International>TAI</font> shifts are stored in it !		* It is allways "stored" in the <font color=#FF8C00 title="Temps Atomique International>TAI</font> time scale (but may be built and/or expressed in other formats). Time scales are available with a factory ([{{JavaDoc4.1}}/fr/cnes/sirius/patrius/time/TimeScalesFactory.html TimeScalesFactory].getXXX()). But, be careful that it is mandatory to use a <font color=#556B2F>'''PATRIUS'''</font> data set as <font color=#FF8C00 title="Coordinated universal time>UTC</font>/<font color=#FF8C00 title="Temps Atomique International>TAI</font> shifts are stored in it !

	Some basic operations may be executed as, for example, comparizon (<font color=#4169E1>compareTo()</font>), computing a duration (<font color=#4169E1>durationFrom()</font>), adding an offset (<font color=#4169E1>shiftedBy()</font>) ...		Some basic operations may be executed as, for example, comparizon (<font color=#4169E1>compareTo()</font>), computing a duration (<font color=#4169E1>durationFrom()</font>), adding an offset (<font color=#4169E1>shiftedBy()</font>) ...

	'''Code example:''' [[~~CreateDates~~\|create dates]]		'''Code example:''' [[CreateDates_4.1\|create dates]]

	[[Category:Tutorials 4.1]]		[[Category:Tutorials 4.1]]

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2018-12-18T09:27:19Z

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== What is a date ? ==

A date is an instance of [{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/time/AbsoluteDate.html AbsoluteDate]. Two important things are necessary to know:
* It is an immutable object, meaning, once it is created, it is no more possible to change it. If you want, for example to shift it, you will have to create a new date, eventually starting from the initial one using the shiftedBy() method;
* It is allways "stored" in the TAI time scale (but may be built and/or expressed in other formats). Time scales are available with a factory ([{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/time/TimeScalesFactory.html TimeScalesFactory].getXXX()). But, be careful that it is mandatory to use a '''PATRIUS''' data set as UTC/TAI shifts are stored in it !

Some basic operations may be executed as, for example, comparizon (compareTo()), computing a duration (durationFrom()), adding an offset (shiftedBy()) ...

'''Code example:''' [[CreateDates|create dates]]

[[Category:Tutorials 4.1]]

Tutorials 4.1 Dates - Historique des versions

Admin le 20 décembre 2018 à 15:38

Admin : Page créée avec « == What is a date ? == A date is an instance of [{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/time/AbsoluteDate.html AbsoluteDate]. Two important things are necessary to... »

Admin : Page créée avec « == What is a date ? == A date is an instance of [{{PathCurrentJavaDoc}}/fr/cnes/sirius/patrius/time/AbsoluteDate.html AbsoluteDate]. Two important things are necessary to... »