Class HistoricChronology
- java.lang.Object
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- javax.time.calendar.Chronology
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- javax.time.i18n.HistoricChronology
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- All Implemented Interfaces:
Serializable
,Calendrical
public final class HistoricChronology extends Chronology implements Serializable
The Historic calendar system.HistoricChronology defines the rules of the Historic calendar system. The Historic calendar has twelve months of 30 days followed by an additional period of 5 or 6 days, modelled as the thirteenth month in this implementation.
Years are measured in the 'Era of the Martyrs'. 0001-01-01 (Historic) equals 0284-08-29 (ISO). The supported range is from Historic year 1 to year 9999 (inclusive).
HistoricChronology is immutable and thread-safe.
- Author:
- Stephen Colebourne
- See Also:
- Serialized Form
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static HistoricChronology
cutoverAt(LocalDate cutover)
Obtains an instance ofHistoricChronology
specifying the cutover date when the Gregorian/ISO calendar system was first used.DateTimeFieldRule<Integer>
dayOfMonthRule()
Gets the rule for the day-of-month field in the Historic chronology.DateTimeFieldRule<DayOfWeek>
dayOfWeekRule()
Gets the rule for the day-of-week field in the Historic chronology.DateTimeFieldRule<Integer>
dayOfYearRule()
Gets the rule for the day-of-year field in the Historic chronology.DateTimeFieldRule<HistoricEra>
eraRule()
Gets the rule for the year field in the Historic chronology.LocalDate
getCutover()
Gets the cutover date of the chronology.String
getName()
Gets the name of the chronology.boolean
isLeapYear(int year)
Checks if the specified year is a leap year.DateTimeFieldRule<MonthOfYear>
monthOfYearRule()
Gets the rule for the month-of-year field in the Historic chronology.static PeriodUnit
periodDays()
Gets the period unit for days.static PeriodUnit
periodEras()
Gets the period unit for eras.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.static HistoricChronology
standardCutover()
Obtains an instance ofHistoricChronology
using the standard cutover date of 1582-10-15.DateTimeFieldRule<Integer>
yearOfEraRule()
Gets the rule for the year field in the Historic chronology.DateTimeFieldRule<Integer>
yearRule()
Gets the rule for the year field in the Historic chronology.-
Methods inherited from class javax.time.calendar.Chronology
get, rule, toString
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Method Detail
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cutoverAt
public static HistoricChronology cutoverAt(LocalDate cutover)
Obtains an instance ofHistoricChronology
specifying the cutover date when the Gregorian/ISO calendar system was first used.- Parameters:
cutover
- the cutover date, not null- Returns:
- a
HistoricChronology
, never null
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standardCutover
public static HistoricChronology standardCutover()
Obtains an instance ofHistoricChronology
using the standard cutover date of 1582-10-15.- Returns:
- a
HistoricChronology
, never null
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isLeapYear
public boolean isLeapYear(int year)
Checks if the specified year is a leap year.A year is leap if the remainder after division by four equals three. This method does not validate the year passed in, and only has a well-defined result for years in the supported range.
- Parameters:
year
- the year to check, not validated for range- Returns:
- true if the year is a leap year
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getCutover
public LocalDate getCutover()
Gets the cutover date of the chronology.- Returns:
- the cutover date of the chronology, never null
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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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eraRule
public DateTimeFieldRule<HistoricEra> eraRule()
Gets the rule for the year field in the Historic chronology.- Returns:
- the rule for the year field, never null
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yearOfEraRule
public DateTimeFieldRule<Integer> yearOfEraRule()
Gets the rule for the year field in the Historic chronology.- Returns:
- the rule for the year field, never null
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yearRule
public DateTimeFieldRule<Integer> yearRule()
Gets the rule for the year field in the Historic chronology.- Returns:
- the rule for the year field, never null
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monthOfYearRule
public DateTimeFieldRule<MonthOfYear> monthOfYearRule()
Gets the rule for the month-of-year field in the Historic chronology.- Returns:
- the rule for the month-of-year field, never null
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dayOfMonthRule
public DateTimeFieldRule<Integer> dayOfMonthRule()
Gets the rule for the day-of-month field in the Historic chronology.- Returns:
- the rule for the day-of-month field, never null
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dayOfYearRule
public DateTimeFieldRule<Integer> dayOfYearRule()
Gets the rule for the day-of-year field in the Historic chronology.- Returns:
- the rule for the day-of-year field, never null
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dayOfWeekRule
public DateTimeFieldRule<DayOfWeek> dayOfWeekRule()
Gets the rule for the day-of-week field in the Historic chronology.- Returns:
- the rule for the day-of-week field, never null
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periodEras
public static PeriodUnit periodEras()
Gets the period unit for eras.The period unit defines the concept of a period of an era.
This is a basic unit and has no equivalent period. The estimated duration is equal to 2,000,000,000 years. This is equivalent to the ISO era period unit.
See
eraRule()
for the main date-time field.- Returns:
- the period unit for years, 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. 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. Historic months are typically 30 days long, except for the 13th month which is 5 or 6 days long. The rule uses an estimated duration of 29.5 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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