- java.lang.Object
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- java.time.chrono.AbstractChronology
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- java.time.chrono.MinguoChronology
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- All Implemented Interfaces:
Serializable
,Comparable<Chronology>
,Chronology
public final class MinguoChronology extends AbstractChronology implements Serializable
The Minguo calendar system.This chronology defines the rules of the Minguo calendar system. This calendar system is primarily used in the Republic of China, often known as Taiwan. Dates are aligned such that
0001-01-01 (Minguo)
is1912-01-01 (ISO)
.The fields are defined as follows:
- era - There are two eras, the current 'Republic' (ERA_ROC) and the previous era (ERA_BEFORE_ROC).
- year-of-era - The year-of-era for the current era increases uniformly from the epoch at year one. For the previous era the year increases from one as time goes backwards. The value for the current era is equal to the ISO proleptic-year minus 1911.
- proleptic-year - The proleptic year is the same as the year-of-era for the current era. For the previous era, years have zero, then negative values. The value is equal to the ISO proleptic-year minus 1911.
- month-of-year - The Minguo month-of-year exactly matches ISO.
- day-of-month - The Minguo day-of-month exactly matches ISO.
- day-of-year - The Minguo day-of-year exactly matches ISO.
- leap-year - The Minguo leap-year pattern exactly matches ISO, such that the two calendars are never out of step.
- Implementation Requirements:
- This class is immutable and thread-safe.
- Since:
- 1.8
- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description static MinguoChronology
INSTANCE
Singleton instance for the Minguo chronology.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description MinguoDate
date(int prolepticYear, int month, int dayOfMonth)
Obtains a local date in Minguo calendar system from the proleptic-year, month-of-year and day-of-month fields.MinguoDate
date(Era era, int yearOfEra, int month, int dayOfMonth)
Obtains a local date in Minguo calendar system from the era, year-of-era, month-of-year and day-of-month fields.MinguoDate
date(TemporalAccessor temporal)
Obtains a local date in this chronology from another temporal object.MinguoDate
dateEpochDay(long epochDay)
Obtains a local date in the Minguo calendar system from the epoch-day.MinguoDate
dateNow()
Obtains the current local date in this chronology from the system clock in the default time-zone.MinguoDate
dateNow(Clock clock)
Obtains the current local date in this chronology from the specified clock.MinguoDate
dateNow(ZoneId zone)
Obtains the current local date in this chronology from the system clock in the specified time-zone.MinguoDate
dateYearDay(int prolepticYear, int dayOfYear)
Obtains a local date in Minguo calendar system from the proleptic-year and day-of-year fields.MinguoDate
dateYearDay(Era era, int yearOfEra, int dayOfYear)
Obtains a local date in Minguo calendar system from the era, year-of-era and day-of-year fields.MinguoEra
eraOf(int eraValue)
Creates the chronology era object from the numeric value.List<Era>
eras()
Gets the list of eras for the chronology.String
getCalendarType()
Gets the calendar type of the underlying calendar system - 'roc'.String
getId()
Gets the ID of the chronology - 'Minguo'.boolean
isLeapYear(long prolepticYear)
Checks if the specified year is a leap year.ChronoLocalDateTime<MinguoDate>
localDateTime(TemporalAccessor temporal)
Obtains a local date-time in this chronology from another temporal object.int
prolepticYear(Era era, int yearOfEra)
Calculates the proleptic-year given the era and year-of-era.ValueRange
range(ChronoField field)
Gets the range of valid values for the specified field.MinguoDate
resolveDate(Map<TemporalField,Long> fieldValues, ResolverStyle resolverStyle)
Resolves parsedChronoField
values into a date during parsing.ChronoZonedDateTime<MinguoDate>
zonedDateTime(Instant instant, ZoneId zone)
Obtains aChronoZonedDateTime
in this chronology from anInstant
.ChronoZonedDateTime<MinguoDate>
zonedDateTime(TemporalAccessor temporal)
Obtains aChronoZonedDateTime
in this chronology from another temporal object.-
Methods inherited from class java.time.chrono.AbstractChronology
compareTo, equals, hashCode, toString
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Methods inherited from interface java.time.chrono.Chronology
epochSecond, epochSecond, from, getDisplayName, period
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Field Detail
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INSTANCE
public static final MinguoChronology INSTANCE
Singleton instance for the Minguo chronology.
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Method Detail
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getId
public String getId()
Gets the ID of the chronology - 'Minguo'.The ID uniquely identifies the
Chronology
. It can be used to lookup theChronology
usingChronology.of(String)
.- Specified by:
getId
in interfaceChronology
- Returns:
- the chronology ID - 'Minguo'
- See Also:
getCalendarType()
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getCalendarType
public String getCalendarType()
Gets the calendar type of the underlying calendar system - 'roc'.The calendar type is an identifier defined by the Unicode Locale Data Markup Language (LDML) specification. It can be used to lookup the
Chronology
usingChronology.of(String)
. It can also be used as part of a locale, accessible viaLocale.getUnicodeLocaleType(String)
with the key 'ca'.- Specified by:
getCalendarType
in interfaceChronology
- Returns:
- the calendar system type - 'roc'
- See Also:
getId()
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date
public MinguoDate date(Era era, int yearOfEra, int month, int dayOfMonth)
Obtains a local date in Minguo calendar system from the era, year-of-era, month-of-year and day-of-month fields.- Specified by:
date
in interfaceChronology
- Parameters:
era
- the Minguo era, not nullyearOfEra
- the year-of-eramonth
- the month-of-yeardayOfMonth
- the day-of-month- Returns:
- the Minguo local date, not null
- Throws:
DateTimeException
- if unable to create the dateClassCastException
- if theera
is not aMinguoEra
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date
public MinguoDate date(int prolepticYear, int month, int dayOfMonth)
Obtains a local date in Minguo calendar system from the proleptic-year, month-of-year and day-of-month fields.- Specified by:
date
in interfaceChronology
- Parameters:
prolepticYear
- the proleptic-yearmonth
- the month-of-yeardayOfMonth
- the day-of-month- Returns:
- the Minguo local date, not null
- Throws:
DateTimeException
- if unable to create the date
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dateYearDay
public MinguoDate dateYearDay(Era era, int yearOfEra, int dayOfYear)
Obtains a local date in Minguo calendar system from the era, year-of-era and day-of-year fields.- Specified by:
dateYearDay
in interfaceChronology
- Parameters:
era
- the Minguo era, not nullyearOfEra
- the year-of-eradayOfYear
- the day-of-year- Returns:
- the Minguo local date, not null
- Throws:
DateTimeException
- if unable to create the dateClassCastException
- if theera
is not aMinguoEra
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dateYearDay
public MinguoDate dateYearDay(int prolepticYear, int dayOfYear)
Obtains a local date in Minguo calendar system from the proleptic-year and day-of-year fields.- Specified by:
dateYearDay
in interfaceChronology
- Parameters:
prolepticYear
- the proleptic-yeardayOfYear
- the day-of-year- Returns:
- the Minguo local date, not null
- Throws:
DateTimeException
- if unable to create the date
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dateEpochDay
public MinguoDate dateEpochDay(long epochDay)
Obtains a local date in the Minguo calendar system from the epoch-day.- Specified by:
dateEpochDay
in interfaceChronology
- Parameters:
epochDay
- the epoch day- Returns:
- the Minguo local date, not null
- Throws:
DateTimeException
- if unable to create the date
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dateNow
public MinguoDate dateNow()
Description copied from interface:Chronology
Obtains the current local date in this chronology from the system clock in the default time-zone.This will query the
system clock
in the default time-zone to obtain the current date.Using this method will prevent the ability to use an alternate clock for testing because the clock is hard-coded.
- Specified by:
dateNow
in interfaceChronology
- Returns:
- the current local date using the system clock and default time-zone, not null
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dateNow
public MinguoDate dateNow(ZoneId zone)
Description copied from interface:Chronology
Obtains the current local date in this chronology from the system clock in the specified time-zone.This will query the
system clock
to obtain the current date. Specifying the time-zone avoids dependence on the default time-zone.Using this method will prevent the ability to use an alternate clock for testing because the clock is hard-coded.
- Specified by:
dateNow
in interfaceChronology
- Parameters:
zone
- the zone ID to use, not null- Returns:
- the current local date using the system clock, not null
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dateNow
public MinguoDate dateNow(Clock clock)
Description copied from interface:Chronology
Obtains the current local date in this chronology from the specified clock.This will query the specified clock to obtain the current date - today. Using this method allows the use of an alternate clock for testing. The alternate clock may be introduced using
dependency injection
.- Specified by:
dateNow
in interfaceChronology
- Parameters:
clock
- the clock to use, not null- Returns:
- the current local date, not null
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date
public MinguoDate date(TemporalAccessor temporal)
Description copied from interface:Chronology
Obtains a local date in this chronology from another temporal object.This obtains a date in this chronology based on the specified temporal. A
TemporalAccessor
represents an arbitrary set of date and time information, which this factory converts to an instance ofChronoLocalDate
.The conversion typically uses the
EPOCH_DAY
field, which is standardized across calendar systems.This method matches the signature of the functional interface
TemporalQuery
allowing it to be used as a query via method reference,aChronology::date
.- Specified by:
date
in interfaceChronology
- Parameters:
temporal
- the temporal object to convert, not null- Returns:
- the local date in this chronology, not null
- See Also:
ChronoLocalDate.from(TemporalAccessor)
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localDateTime
public ChronoLocalDateTime<MinguoDate> localDateTime(TemporalAccessor temporal)
Description copied from interface:Chronology
Obtains a local date-time in this chronology from another temporal object.This obtains a date-time in this chronology based on the specified temporal. A
TemporalAccessor
represents an arbitrary set of date and time information, which this factory converts to an instance ofChronoLocalDateTime
.The conversion extracts and combines the
ChronoLocalDate
and theLocalTime
from the temporal object. Implementations are permitted to perform optimizations such as accessing those fields that are equivalent to the relevant objects. The result uses this chronology.This method matches the signature of the functional interface
TemporalQuery
allowing it to be used as a query via method reference,aChronology::localDateTime
.- Specified by:
localDateTime
in interfaceChronology
- Parameters:
temporal
- the temporal object to convert, not null- Returns:
- the local date-time in this chronology, not null
- See Also:
ChronoLocalDateTime.from(TemporalAccessor)
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zonedDateTime
public ChronoZonedDateTime<MinguoDate> zonedDateTime(TemporalAccessor temporal)
Description copied from interface:Chronology
Obtains aChronoZonedDateTime
in this chronology from another temporal object.This obtains a zoned date-time in this chronology based on the specified temporal. A
TemporalAccessor
represents an arbitrary set of date and time information, which this factory converts to an instance ofChronoZonedDateTime
.The conversion will first obtain a
ZoneId
from the temporal object, falling back to aZoneOffset
if necessary. It will then try to obtain anInstant
, falling back to aChronoLocalDateTime
if necessary. The result will be either the combination ofZoneId
orZoneOffset
withInstant
orChronoLocalDateTime
. Implementations are permitted to perform optimizations such as accessing those fields that are equivalent to the relevant objects. The result uses this chronology.This method matches the signature of the functional interface
TemporalQuery
allowing it to be used as a query via method reference,aChronology::zonedDateTime
.- Specified by:
zonedDateTime
in interfaceChronology
- Parameters:
temporal
- the temporal object to convert, not null- Returns:
- the zoned date-time in this chronology, not null
- See Also:
ChronoZonedDateTime.from(TemporalAccessor)
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zonedDateTime
public ChronoZonedDateTime<MinguoDate> zonedDateTime(Instant instant, ZoneId zone)
Description copied from interface:Chronology
Obtains aChronoZonedDateTime
in this chronology from anInstant
.This obtains a zoned date-time with the same instant as that specified.
- Specified by:
zonedDateTime
in interfaceChronology
- Parameters:
instant
- the instant to create the date-time from, not nullzone
- the time-zone, not null- Returns:
- the zoned date-time, not null
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isLeapYear
public boolean isLeapYear(long prolepticYear)
Checks if the specified year is a leap year.Minguo leap years occur exactly in line with ISO leap years. This method does not validate the year passed in, and only has a well-defined result for years in the supported range.
- Specified by:
isLeapYear
in interfaceChronology
- Parameters:
prolepticYear
- the proleptic-year to check, not validated for range- Returns:
- true if the year is a leap year
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prolepticYear
public int prolepticYear(Era era, int yearOfEra)
Description copied from interface:Chronology
Calculates the proleptic-year given the era and year-of-era.This combines the era and year-of-era into the single proleptic-year field.
If the chronology makes active use of eras, such as
JapaneseChronology
then the year-of-era will be validated against the era. For other chronologies, validation is optional.- Specified by:
prolepticYear
in interfaceChronology
- Parameters:
era
- the era of the correct type for the chronology, not nullyearOfEra
- the chronology year-of-era- Returns:
- the proleptic-year
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eraOf
public MinguoEra eraOf(int eraValue)
Description copied from interface:Chronology
Creates the chronology era object from the numeric value.The era is, conceptually, the largest division of the time-line. Most calendar systems have a single epoch dividing the time-line into two eras. However, some have multiple eras, such as one for the reign of each leader. The exact meaning is determined by the chronology according to the following constraints.
The era in use at 1970-01-01 must have the value 1. Later eras must have sequentially higher values. Earlier eras must have sequentially lower values. Each chronology must refer to an enum or similar singleton to provide the era values.
This method returns the singleton era of the correct type for the specified era value.
- Specified by:
eraOf
in interfaceChronology
- Parameters:
eraValue
- the era value- Returns:
- the calendar system era, not null
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eras
public List<Era> eras()
Description copied from interface:Chronology
Gets the list of eras for the chronology.Most calendar systems have an era, within which the year has meaning. If the calendar system does not support the concept of eras, an empty list must be returned.
- Specified by:
eras
in interfaceChronology
- Returns:
- the list of eras for the chronology, may be immutable, not null
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range
public ValueRange range(ChronoField field)
Description copied from interface:Chronology
Gets the range of valid values for the specified field.All fields can be expressed as a
long
integer. This method returns an object that describes the valid range for that value.Note that the result only describes the minimum and maximum valid values and it is important not to read too much into them. For example, there could be values within the range that are invalid for the field.
This method will return a result whether or not the chronology supports the field.
- Specified by:
range
in interfaceChronology
- Parameters:
field
- the field to get the range for, not null- Returns:
- the range of valid values for the field, not null
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resolveDate
public MinguoDate resolveDate(Map<TemporalField,Long> fieldValues, ResolverStyle resolverStyle)
Description copied from class:AbstractChronology
Resolves parsedChronoField
values into a date during parsing.Most
TemporalField
implementations are resolved using the resolve method on the field. By contrast, theChronoField
class defines fields that only have meaning relative to the chronology. As such,ChronoField
date fields are resolved here in the context of a specific chronology.ChronoField
instances are resolved by this method, which may be overridden in subclasses.EPOCH_DAY
- If present, this is converted to a date and all other date fields are then cross-checked against the date.PROLEPTIC_MONTH
- If present, then it is split into theYEAR
andMONTH_OF_YEAR
. If the mode is strict or smart then the field is validated.YEAR_OF_ERA
andERA
- If both are present, then they are combined to form aYEAR
. In lenient mode, theYEAR_OF_ERA
range is not validated, in smart and strict mode it is. TheERA
is validated for range in all three modes. If only theYEAR_OF_ERA
is present, and the mode is smart or lenient, then the last available era is assumed. In strict mode, no era is assumed and theYEAR_OF_ERA
is left untouched. If only theERA
is present, then it is left untouched.YEAR
,MONTH_OF_YEAR
andDAY_OF_MONTH
- If all three are present, then they are combined to form a date. In all three modes, theYEAR
is validated. If the mode is smart or strict, then the month and day are validated. If the mode is lenient, then the date is combined in a manner equivalent to creating a date on the first day of the first month in the requested year, then adding the difference in months, then the difference in days. If the mode is smart, and the day-of-month is greater than the maximum for the year-month, then the day-of-month is adjusted to the last day-of-month. If the mode is strict, then the three fields must form a valid date.YEAR
andDAY_OF_YEAR
- If both are present, then they are combined to form a date. In all three modes, theYEAR
is validated. If the mode is lenient, then the date is combined in a manner equivalent to creating a date on the first day of the requested year, then adding the difference in days. If the mode is smart or strict, then the two fields must form a valid date.YEAR
,MONTH_OF_YEAR
,ALIGNED_WEEK_OF_MONTH
andALIGNED_DAY_OF_WEEK_IN_MONTH
- If all four are present, then they are combined to form a date. In all three modes, theYEAR
is validated. If the mode is lenient, then the date is combined in a manner equivalent to creating a date on the first day of the first month in the requested year, then adding the difference in months, then the difference in weeks, then in days. If the mode is smart or strict, then the all four fields are validated to their outer ranges. The date is then combined in a manner equivalent to creating a date on the first day of the requested year and month, then adding the amount in weeks and days to reach their values. If the mode is strict, the date is additionally validated to check that the day and week adjustment did not change the month.YEAR
,MONTH_OF_YEAR
,ALIGNED_WEEK_OF_MONTH
andDAY_OF_WEEK
- If all four are present, then they are combined to form a date. The approach is the same as described above for years, months and weeks inALIGNED_DAY_OF_WEEK_IN_MONTH
. The day-of-week is adjusted as the next or same matching day-of-week once the years, months and weeks have been handled.YEAR
,ALIGNED_WEEK_OF_YEAR
andALIGNED_DAY_OF_WEEK_IN_YEAR
- If all three are present, then they are combined to form a date. In all three modes, theYEAR
is validated. If the mode is lenient, then the date is combined in a manner equivalent to creating a date on the first day of the requested year, then adding the difference in weeks, then in days. If the mode is smart or strict, then the all three fields are validated to their outer ranges. The date is then combined in a manner equivalent to creating a date on the first day of the requested year, then adding the amount in weeks and days to reach their values. If the mode is strict, the date is additionally validated to check that the day and week adjustment did not change the year.YEAR
,ALIGNED_WEEK_OF_YEAR
andDAY_OF_WEEK
- If all three are present, then they are combined to form a date. The approach is the same as described above for years and weeks inALIGNED_DAY_OF_WEEK_IN_YEAR
. The day-of-week is adjusted as the next or same matching day-of-week once the years and weeks have been handled.
The default implementation is suitable for most calendar systems. If
ChronoField.YEAR_OF_ERA
is found without anChronoField.ERA
then the last era inChronology.eras()
is used. The implementation assumes a 7 day week, that the first day-of-month has the value 1, that first day-of-year has the value 1, and that the first of the month and year always exists.- Specified by:
resolveDate
in interfaceChronology
- Overrides:
resolveDate
in classAbstractChronology
- Parameters:
fieldValues
- the map of fields to values, which can be updated, not nullresolverStyle
- the requested type of resolve, not null- Returns:
- the resolved date, null if insufficient information to create a date
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