Class JulianChronology
- java.lang.Object
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- javax.time.calendar.Chronology
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- javax.time.i18n.JulianChronology
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- All Implemented Interfaces:
Serializable
,Calendrical
public final class JulianChronology extends Chronology implements Serializable
The Julian calendar system.JulianChronology defines the rules of the Julian calendar system. The Julian calendar was introduced by Julius Caesar in 46 BCE to replace the previous Roman calendar system.
The calendar system is the same as the
ISOChronology ISO-8601
calendar system with the exception of the rule for the leap year. The Julian definition has a leap year every four years without fail.JulianChronology is immutable and thread-safe.
- Author:
- Stephen Colebourne
- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description static JulianChronology
INSTANCE
The singleton instance ofJulianChronology
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description String
getName()
Gets the name of the chronology.static boolean
isLeapYear(int year)
Checks if the specified year is a leap year.static PeriodUnit
periodDays()
Gets the period unit for days.static PeriodUnit
periodMonths()
Gets the period unit for months.static PeriodUnit
periodWeeks()
Gets the period unit for weeks.static PeriodUnit
periodYears()
Gets the period unit for years.-
Methods inherited from class javax.time.calendar.Chronology
get, rule, toString
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Field Detail
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INSTANCE
public static final JulianChronology INSTANCE
The singleton instance ofJulianChronology
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Method Detail
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isLeapYear
public static boolean isLeapYear(int year)
Checks if the specified year is a leap year.The Julian calendar system defines a leap year as being divisible by four without remainder. The calculation is proleptic - applying the same rules into the far future and far past.
- Parameters:
year
- the year to check, not validated for range- Returns:
- true if the year is a leap year
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getName
public String getName()
Gets the name of the chronology.- Specified by:
getName
in classChronology
- Returns:
- the name of the chronology, never null
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periodYears
public static PeriodUnit periodYears()
Gets the period unit for years.The period unit defines the concept of a period of a year in the Julian calendar system. This has an estimated duration equal to 365.25 days.
See
#yearRule()
for the main date-time field.- Returns:
- the period unit for years, never null
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periodMonths
public static PeriodUnit periodMonths()
Gets the period unit for months.The period unit defines the concept of a period of a month in the Julian calendar system. This has an estimated duration equal to one-twelfth of 365.25 days.
See
#monthOfYearRule()
for the main date-time field.- Returns:
- the period unit for months, never null
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periodWeeks
public static PeriodUnit periodWeeks()
Gets the period unit for weeks.The period unit defines the concept of a period of a week. This is equivalent to the ISO weeks period unit.
- Returns:
- the period unit for weeks, never null
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periodDays
public static PeriodUnit periodDays()
Gets the period unit for days.The period unit defines the concept of a period of a day. This is equivalent to the ISO days period unit.
See
#dayOfMonthRule()
for the main date-time field.- Returns:
- the period unit for days, never null
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