- All Implemented Interfaces:
Serializable
,Comparable<Year>
,Temporal
,TemporalAccessor
,TemporalAdjuster
2007
.
Year
is an immutable date-time object that represents a year.
Any field that can be derived from a year can be obtained.
Note that years in the ISO chronology only align with years in the Gregorian-Julian system for modern years. Parts of Russia did not switch to the modern Gregorian/ISO rules until 1920. As such, historical years must be treated with caution.
This class does not store or represent a month, day, time or time-zone.
For example, the value "2007" can be stored in a Year
.
Years represented by this class follow the ISO-8601 standard and use the proleptic numbering system. Year 1 is preceded by year 0, then by year -1.
The ISO-8601 calendar system is the modern civil calendar system used today in most of the world. It is equivalent to the proleptic Gregorian calendar system, in which today's rules for leap years are applied for all time. For most applications written today, the ISO-8601 rules are entirely suitable. However, any application that makes use of historical dates, and requires them to be accurate will find the ISO-8601 approach unsuitable.
This is a value-based
class; programmers should treat instances that are
equal as interchangeable and should not
use instances for synchronization, or unpredictable behavior may
occur. For example, in a future release, synchronization may fail.
The equals
method should be used for comparisons.
- Implementation Requirements:
- This class is immutable and thread-safe.
- Since:
- 1.8
- See Also:
-
Field Summary
-
Method Summary
Modifier and TypeMethodDescriptionadjustInto
(Temporal temporal) Adjusts the specified temporal object to have this year.atDay
(int dayOfYear) Combines this year with a day-of-year to create aLocalDate
.atMonth
(int month) Combines this year with a month to create aYearMonth
.Combines this year with a month to create aYearMonth
.atMonthDay
(MonthDay monthDay) Combines this year with a month-day to create aLocalDate
.int
Compares this year to another year.boolean
Checks if this year is equal to another year.format
(DateTimeFormatter formatter) Formats this year using the specified formatter.static Year
from
(TemporalAccessor temporal) Obtains an instance ofYear
from a temporal object.int
get
(TemporalField field) Gets the value of the specified field from this year as anint
.long
getLong
(TemporalField field) Gets the value of the specified field from this year as along
.int
getValue()
Gets the year value.int
hashCode()
A hash code for this year.boolean
Checks if this year is after the specified year.boolean
Checks if this year is before the specified year.boolean
isLeap()
Checks if the year is a leap year, according to the ISO proleptic calendar system rules.static boolean
isLeap
(long year) Checks if the year is a leap year, according to the ISO proleptic calendar system rules.boolean
isSupported
(TemporalField field) Checks if the specified field is supported.boolean
isSupported
(TemporalUnit unit) Checks if the specified unit is supported.boolean
isValidMonthDay
(MonthDay monthDay) Checks if the month-day is valid for this year.int
length()
Gets the length of this year in days.minus
(long amountToSubtract, TemporalUnit unit) Returns a copy of this year with the specified amount subtracted.minus
(TemporalAmount amountToSubtract) Returns a copy of this year with the specified amount subtracted.minusYears
(long yearsToSubtract) Returns a copy of thisYear
with the specified number of years subtracted.static Year
now()
Obtains the current year from the system clock in the default time-zone.static Year
Obtains the current year from the specified clock.static Year
Obtains the current year from the system clock in the specified time-zone.static Year
of
(int isoYear) Obtains an instance ofYear
.static Year
parse
(CharSequence text) Obtains an instance ofYear
from a text string such as2007
.static Year
parse
(CharSequence text, DateTimeFormatter formatter) Obtains an instance ofYear
from a text string using a specific formatter.plus
(long amountToAdd, TemporalUnit unit) Returns a copy of this year with the specified amount added.plus
(TemporalAmount amountToAdd) Returns a copy of this year with the specified amount added.plusYears
(long yearsToAdd) Returns a copy of thisYear
with the specified number of years added.<R> R
query
(TemporalQuery<R> query) Queries this year using the specified query.range
(TemporalField field) Gets the range of valid values for the specified field.toString()
Outputs this year as aString
.long
until
(Temporal endExclusive, TemporalUnit unit) Calculates the amount of time until another year in terms of the specified unit.with
(TemporalAdjuster adjuster) Returns an adjusted copy of this year.with
(TemporalField field, long newValue) Returns a copy of this year with the specified field set to a new value.
-
Field Details
-
MIN_VALUE
public static final int MIN_VALUEThe minimum supported year, '-999,999,999'.- See Also:
-
MAX_VALUE
public static final int MAX_VALUEThe maximum supported year, '+999,999,999'.- See Also:
-
-
Method Details
-
now
Obtains the current year from the system clock in the default time-zone.This will query the
system clock
in the default time-zone to obtain the current year.Using this method will prevent the ability to use an alternate clock for testing because the clock is hard-coded.
- Returns:
- the current year using the system clock and default time-zone, not null
-
now
Obtains the current year from the system clock in the specified time-zone.This will query the
system clock
to obtain the current year. 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.
- Parameters:
zone
- the zone ID to use, not null- Returns:
- the current year using the system clock, not null
-
now
Obtains the current year from the specified clock.This will query the specified clock to obtain the current year. Using this method allows the use of an alternate clock for testing. The alternate clock may be introduced using
dependency injection
.- Parameters:
clock
- the clock to use, not null- Returns:
- the current year, not null
-
of
Obtains an instance ofYear
.This method accepts a year value from the proleptic ISO calendar system.
The year 2AD/CE is represented by 2.
The year 1AD/CE is represented by 1.
The year 1BC/BCE is represented by 0.
The year 2BC/BCE is represented by -1.- Parameters:
isoYear
- the ISO proleptic year to represent, fromMIN_VALUE
toMAX_VALUE
- Returns:
- the year, not null
- Throws:
DateTimeException
- if the field is invalid
-
from
Obtains an instance ofYear
from a temporal object.This obtains a year based on the specified temporal. A
TemporalAccessor
represents an arbitrary set of date and time information, which this factory converts to an instance ofYear
.The conversion extracts the
year
field. The extraction is only permitted if the temporal object has an ISO chronology, or can be converted to aLocalDate
.This method matches the signature of the functional interface
TemporalQuery
allowing it to be used as a query via method reference,Year::from
.- Parameters:
temporal
- the temporal object to convert, not null- Returns:
- the year, not null
- Throws:
DateTimeException
- if unable to convert to aYear
-
parse
Obtains an instance ofYear
from a text string such as2007
.The string must represent a valid year.
- Parameters:
text
- the text to parse such as "2007", not null- Returns:
- the parsed year, not null
- Throws:
DateTimeParseException
- if the text cannot be parsed
-
parse
Obtains an instance ofYear
from a text string using a specific formatter.The text is parsed using the formatter, returning a year.
- Parameters:
text
- the text to parse, not nullformatter
- the formatter to use, not null- Returns:
- the parsed year, not null
- Throws:
DateTimeParseException
- if the text cannot be parsed
-
isLeap
public static boolean isLeap(long year) Checks if the year is a leap year, according to the ISO proleptic calendar system rules.This method applies the current rules for leap years across the whole time-line. In general, a year is a leap year if it is divisible by four without remainder. However, years divisible by 100, are not leap years, with the exception of years divisible by 400 which are.
For example, 1904 is a leap year it is divisible by 4. 1900 was not a leap year as it is divisible by 100, however 2000 was a leap year as it is divisible by 400.
The calculation is proleptic - applying the same rules into the far future and far past. This is historically inaccurate, but is correct for the ISO-8601 standard.
- Parameters:
year
- the year to check- Returns:
- true if the year is leap, false otherwise
-
getValue
public int getValue()Gets the year value.The year returned by this method is proleptic as per
get(YEAR)
.- Returns:
- the year,
MIN_VALUE
toMAX_VALUE
-
isSupported
Checks if the specified field is supported.This checks if this year can be queried for the specified field. If false, then calling the
range
,get
andwith(TemporalField, long)
methods will throw an exception.If the field is a
ChronoField
then the query is implemented here. The supported fields are:YEAR_OF_ERA
YEAR
ERA
ChronoField
instances will return false.If the field is not a
ChronoField
, then the result of this method is obtained by invokingTemporalField.isSupportedBy(TemporalAccessor)
passingthis
as the argument. Whether the field is supported is determined by the field.- Specified by:
isSupported
in interfaceTemporalAccessor
- Parameters:
field
- the field to check, null returns false- Returns:
- true if the field is supported on this year, false if not
-
isSupported
Checks if the specified unit is supported.This checks if the specified unit can be added to, or subtracted from, this year. If false, then calling the
plus(long, TemporalUnit)
andminus
methods will throw an exception.If the unit is a
ChronoUnit
then the query is implemented here. The supported units are:YEARS
DECADES
CENTURIES
MILLENNIA
ERAS
ChronoUnit
instances will return false.If the unit is not a
ChronoUnit
, then the result of this method is obtained by invokingTemporalUnit.isSupportedBy(Temporal)
passingthis
as the argument. Whether the unit is supported is determined by the unit.- Specified by:
isSupported
in interfaceTemporal
- Parameters:
unit
- the unit to check, null returns false- Returns:
- true if the unit can be added/subtracted, false if not
-
range
Gets the range of valid values for the specified field.The range object expresses the minimum and maximum valid values for a field. This year is used to enhance the accuracy of the returned range. If it is not possible to return the range, because the field is not supported or for some other reason, an exception is thrown.
If the field is a
ChronoField
then the query is implemented here. Thesupported fields
will return appropriate range instances. All otherChronoField
instances will throw anUnsupportedTemporalTypeException
.If the field is not a
ChronoField
, then the result of this method is obtained by invokingTemporalField.rangeRefinedBy(TemporalAccessor)
passingthis
as the argument. Whether the range can be obtained is determined by the field.- Specified by:
range
in interfaceTemporalAccessor
- Parameters:
field
- the field to query the range for, not null- Returns:
- the range of valid values for the field, not null
- Throws:
DateTimeException
- if the range for the field cannot be obtainedUnsupportedTemporalTypeException
- if the field is not supported
-
get
Gets the value of the specified field from this year as anint
.This queries this year for the value of the specified field. The returned value will always be within the valid range of values for the field. If it is not possible to return the value, because the field is not supported or for some other reason, an exception is thrown.
If the field is a
ChronoField
then the query is implemented here. Thesupported fields
will return valid values based on this year. All otherChronoField
instances will throw anUnsupportedTemporalTypeException
.If the field is not a
ChronoField
, then the result of this method is obtained by invokingTemporalField.getFrom(TemporalAccessor)
passingthis
as the argument. Whether the value can be obtained, and what the value represents, is determined by the field.- Specified by:
get
in interfaceTemporalAccessor
- Parameters:
field
- the field to get, not null- Returns:
- the value for the field
- Throws:
DateTimeException
- if a value for the field cannot be obtained or the value is outside the range of valid values for the fieldUnsupportedTemporalTypeException
- if the field is not supported or the range of values exceeds anint
ArithmeticException
- if numeric overflow occurs
-
getLong
Gets the value of the specified field from this year as along
.This queries this year for the value of the specified field. If it is not possible to return the value, because the field is not supported or for some other reason, an exception is thrown.
If the field is a
ChronoField
then the query is implemented here. Thesupported fields
will return valid values based on this year. All otherChronoField
instances will throw anUnsupportedTemporalTypeException
.If the field is not a
ChronoField
, then the result of this method is obtained by invokingTemporalField.getFrom(TemporalAccessor)
passingthis
as the argument. Whether the value can be obtained, and what the value represents, is determined by the field.- Specified by:
getLong
in interfaceTemporalAccessor
- Parameters:
field
- the field to get, not null- Returns:
- the value for the field
- Throws:
DateTimeException
- if a value for the field cannot be obtainedUnsupportedTemporalTypeException
- if the field is not supportedArithmeticException
- if numeric overflow occurs
-
isLeap
public boolean isLeap()Checks if the year is a leap year, according to the ISO proleptic calendar system rules.This method applies the current rules for leap years across the whole time-line. In general, a year is a leap year if it is divisible by four without remainder. However, years divisible by 100, are not leap years, with the exception of years divisible by 400 which are.
For example, 1904 is a leap year it is divisible by 4. 1900 was not a leap year as it is divisible by 100, however 2000 was a leap year as it is divisible by 400.
The calculation is proleptic - applying the same rules into the far future and far past. This is historically inaccurate, but is correct for the ISO-8601 standard.
- Returns:
- true if the year is leap, false otherwise
-
isValidMonthDay
Checks if the month-day is valid for this year.This method checks whether this year and the input month and day form a valid date.
- Parameters:
monthDay
- the month-day to validate, null returns false- Returns:
- true if the month and day are valid for this year
-
length
public int length()Gets the length of this year in days.- Returns:
- the length of this year in days, 365 or 366
-
with
Returns an adjusted copy of this year.This returns a
Year
, based on this one, with the year adjusted. The adjustment takes place using the specified adjuster strategy object. Read the documentation of the adjuster to understand what adjustment will be made.The result of this method is obtained by invoking the
TemporalAdjuster.adjustInto(Temporal)
method on the specified adjuster passingthis
as the argument.This instance is immutable and unaffected by this method call.
- Specified by:
with
in interfaceTemporal
- Parameters:
adjuster
- the adjuster to use, not null- Returns:
- a
Year
based onthis
with the adjustment made, not null - Throws:
DateTimeException
- if the adjustment cannot be madeArithmeticException
- if numeric overflow occurs
-
with
Returns a copy of this year with the specified field set to a new value.This returns a
Year
, based on this one, with the value for the specified field changed. If it is not possible to set the value, because the field is not supported or for some other reason, an exception is thrown.If the field is a
ChronoField
then the adjustment is implemented here. The supported fields behave as follows:YEAR_OF_ERA
- Returns aYear
with the specified year-of-era The era will be unchanged.YEAR
- Returns aYear
with the specified year. This completely replaces the date and is equivalent toof(int)
.ERA
- Returns aYear
with the specified era. The year-of-era will be unchanged.
In all cases, if the new value is outside the valid range of values for the field then a
DateTimeException
will be thrown.All other
ChronoField
instances will throw anUnsupportedTemporalTypeException
.If the field is not a
ChronoField
, then the result of this method is obtained by invokingTemporalField.adjustInto(Temporal, long)
passingthis
as the argument. In this case, the field determines whether and how to adjust the instant.This instance is immutable and unaffected by this method call.
- Specified by:
with
in interfaceTemporal
- Parameters:
field
- the field to set in the result, not nullnewValue
- the new value of the field in the result- Returns:
- a
Year
based onthis
with the specified field set, not null - Throws:
DateTimeException
- if the field cannot be setUnsupportedTemporalTypeException
- if the field is not supportedArithmeticException
- if numeric overflow occurs
-
plus
Returns a copy of this year with the specified amount added.This returns a
Year
, based on this one, with the specified amount added. The amount is typicallyPeriod
but may be any other type implementing theTemporalAmount
interface.The calculation is delegated to the amount object by calling
TemporalAmount.addTo(Temporal)
. The amount implementation is free to implement the addition in any way it wishes, however it typically calls back toplus(long, TemporalUnit)
. Consult the documentation of the amount implementation to determine if it can be successfully added.This instance is immutable and unaffected by this method call.
- Specified by:
plus
in interfaceTemporal
- Parameters:
amountToAdd
- the amount to add, not null- Returns:
- a
Year
based on this year with the addition made, not null - Throws:
DateTimeException
- if the addition cannot be madeArithmeticException
- if numeric overflow occurs
-
plus
Returns a copy of this year with the specified amount added.This returns a
Year
, based on this one, with the amount in terms of the unit added. If it is not possible to add the amount, because the unit is not supported or for some other reason, an exception is thrown.If the field is a
ChronoUnit
then the addition is implemented here. The supported fields behave as follows:YEARS
- Returns aYear
with the specified number of years added. This is equivalent toplusYears(long)
.DECADES
- Returns aYear
with the specified number of decades added. This is equivalent to callingplusYears(long)
with the amount multiplied by 10.CENTURIES
- Returns aYear
with the specified number of centuries added. This is equivalent to callingplusYears(long)
with the amount multiplied by 100.MILLENNIA
- Returns aYear
with the specified number of millennia added. This is equivalent to callingplusYears(long)
with the amount multiplied by 1,000.ERAS
- Returns aYear
with the specified number of eras added. Only two eras are supported so the amount must be one, zero or minus one. If the amount is non-zero then the year is changed such that the year-of-era is unchanged.
All other
ChronoUnit
instances will throw anUnsupportedTemporalTypeException
.If the field is not a
ChronoUnit
, then the result of this method is obtained by invokingTemporalUnit.addTo(Temporal, long)
passingthis
as the argument. In this case, the unit determines whether and how to perform the addition.This instance is immutable and unaffected by this method call.
- Specified by:
plus
in interfaceTemporal
- Parameters:
amountToAdd
- the amount of the unit to add to the result, may be negativeunit
- the unit of the amount to add, not null- Returns:
- a
Year
based on this year with the specified amount added, not null - Throws:
DateTimeException
- if the addition cannot be madeUnsupportedTemporalTypeException
- if the unit is not supportedArithmeticException
- if numeric overflow occurs
-
plusYears
Returns a copy of thisYear
with the specified number of years added.This instance is immutable and unaffected by this method call.
- Parameters:
yearsToAdd
- the years to add, may be negative- Returns:
- a
Year
based on this year with the years added, not null - Throws:
DateTimeException
- if the result exceeds the supported range
-
minus
Returns a copy of this year with the specified amount subtracted.This returns a
Year
, based on this one, with the specified amount subtracted. The amount is typicallyPeriod
but may be any other type implementing theTemporalAmount
interface.The calculation is delegated to the amount object by calling
TemporalAmount.subtractFrom(Temporal)
. The amount implementation is free to implement the subtraction in any way it wishes, however it typically calls back tominus(long, TemporalUnit)
. Consult the documentation of the amount implementation to determine if it can be successfully subtracted.This instance is immutable and unaffected by this method call.
- Specified by:
minus
in interfaceTemporal
- Parameters:
amountToSubtract
- the amount to subtract, not null- Returns:
- a
Year
based on this year with the subtraction made, not null - Throws:
DateTimeException
- if the subtraction cannot be madeArithmeticException
- if numeric overflow occurs
-
minus
Returns a copy of this year with the specified amount subtracted.This returns a
Year
, based on this one, with the amount in terms of the unit subtracted. If it is not possible to subtract the amount, because the unit is not supported or for some other reason, an exception is thrown.This method is equivalent to
plus(long, TemporalUnit)
with the amount negated. See that method for a full description of how addition, and thus subtraction, works.This instance is immutable and unaffected by this method call.
- Specified by:
minus
in interfaceTemporal
- Parameters:
amountToSubtract
- the amount of the unit to subtract from the result, may be negativeunit
- the unit of the amount to subtract, not null- Returns:
- a
Year
based on this year with the specified amount subtracted, not null - Throws:
DateTimeException
- if the subtraction cannot be madeUnsupportedTemporalTypeException
- if the unit is not supportedArithmeticException
- if numeric overflow occurs
-
minusYears
Returns a copy of thisYear
with the specified number of years subtracted.This instance is immutable and unaffected by this method call.
- Parameters:
yearsToSubtract
- the years to subtract, may be negative- Returns:
- a
Year
based on this year with the year subtracted, not null - Throws:
DateTimeException
- if the result exceeds the supported range
-
query
Queries this year using the specified query.This queries this year using the specified query strategy object. The
TemporalQuery
object defines the logic to be used to obtain the result. Read the documentation of the query to understand what the result of this method will be.The result of this method is obtained by invoking the
TemporalQuery.queryFrom(TemporalAccessor)
method on the specified query passingthis
as the argument.- Specified by:
query
in interfaceTemporalAccessor
- Type Parameters:
R
- the type of the result- Parameters:
query
- the query to invoke, not null- Returns:
- the query result, null may be returned (defined by the query)
- Throws:
DateTimeException
- if unable to query (defined by the query)ArithmeticException
- if numeric overflow occurs (defined by the query)
-
adjustInto
Adjusts the specified temporal object to have this year.This returns a temporal object of the same observable type as the input with the year changed to be the same as this.
The adjustment is equivalent to using
Temporal.with(TemporalField, long)
passingChronoField.YEAR
as the field. If the specified temporal object does not use the ISO calendar system then aDateTimeException
is thrown.In most cases, it is clearer to reverse the calling pattern by using
Temporal.with(TemporalAdjuster)
:// these two lines are equivalent, but the second approach is recommended temporal = thisYear.adjustInto(temporal); temporal = temporal.with(thisYear);
This instance is immutable and unaffected by this method call.
- Specified by:
adjustInto
in interfaceTemporalAdjuster
- Parameters:
temporal
- the target object to be adjusted, not null- Returns:
- the adjusted object, not null
- Throws:
DateTimeException
- if unable to make the adjustmentArithmeticException
- if numeric overflow occurs
-
until
Calculates the amount of time until another year in terms of the specified unit.This calculates the amount of time between two
Year
objects in terms of a singleTemporalUnit
. The start and end points arethis
and the specified year. The result will be negative if the end is before the start. TheTemporal
passed to this method is converted to aYear
usingfrom(TemporalAccessor)
. For example, the amount in decades between two year can be calculated usingstartYear.until(endYear, DECADES)
.The calculation returns a whole number, representing the number of complete units between the two years. For example, the amount in decades between 2012 and 2031 will only be one decade as it is one year short of two decades.
There are two equivalent ways of using this method. The first is to invoke this method. The second is to use
TemporalUnit.between(Temporal, Temporal)
:// these two lines are equivalent amount = start.until(end, YEARS); amount = YEARS.between(start, end);
The choice should be made based on which makes the code more readable.The calculation is implemented in this method for
ChronoUnit
. The unitsYEARS
,DECADES
,CENTURIES
,MILLENNIA
andERAS
are supported. OtherChronoUnit
values will throw an exception.If the unit is not a
ChronoUnit
, then the result of this method is obtained by invokingTemporalUnit.between(Temporal, Temporal)
passingthis
as the first argument and the converted input temporal as the second argument.This instance is immutable and unaffected by this method call.
- Specified by:
until
in interfaceTemporal
- Parameters:
endExclusive
- the end date, exclusive, which is converted to aYear
, not nullunit
- the unit to measure the amount in, not null- Returns:
- the amount of time between this year and the end year
- Throws:
DateTimeException
- if the amount cannot be calculated, or the end temporal cannot be converted to aYear
UnsupportedTemporalTypeException
- if the unit is not supportedArithmeticException
- if numeric overflow occurs
-
format
Formats this year using the specified formatter.This year will be passed to the formatter to produce a string.
- Parameters:
formatter
- the formatter to use, not null- Returns:
- the formatted year string, not null
- Throws:
DateTimeException
- if an error occurs during printing
-
atDay
Combines this year with a day-of-year to create aLocalDate
.This returns a
LocalDate
formed from this year and the specified day-of-year.The day-of-year value 366 is only valid in a leap year.
- Parameters:
dayOfYear
- the day-of-year to use, from 1 to 365-366- Returns:
- the local date formed from this year and the specified date of year, not null
- Throws:
DateTimeException
- if the day of year is zero or less, 366 or greater or equal to 366 and this is not a leap year
-
atMonth
Combines this year with a month to create aYearMonth
.This returns a
YearMonth
formed from this year and the specified month. All possible combinations of year and month are valid.This method can be used as part of a chain to produce a date:
LocalDate date = year.atMonth(month).atDay(day);
- Parameters:
month
- the month-of-year to use, not null- Returns:
- the year-month formed from this year and the specified month, not null
-
atMonth
Combines this year with a month to create aYearMonth
.This returns a
YearMonth
formed from this year and the specified month. All possible combinations of year and month are valid.This method can be used as part of a chain to produce a date:
LocalDate date = year.atMonth(month).atDay(day);
- Parameters:
month
- the month-of-year to use, from 1 (January) to 12 (December)- Returns:
- the year-month formed from this year and the specified month, not null
- Throws:
DateTimeException
- if the month is invalid
-
atMonthDay
Combines this year with a month-day to create aLocalDate
.This returns a
LocalDate
formed from this year and the specified month-day.A month-day of February 29th will be adjusted to February 28th in the resulting date if the year is not a leap year.
- Parameters:
monthDay
- the month-day to use, not null- Returns:
- the local date formed from this year and the specified month-day, not null
-
compareTo
Compares this year to another year.The comparison is based on the value of the year. It is "consistent with equals", as defined by
Comparable
.- Specified by:
compareTo
in interfaceComparable<Year>
- Parameters:
other
- the other year to compare to, not null- Returns:
- the comparator value, that is less than zero if this is before
other
, zero if they are equal, or greater than zero if this is afterother
- See Also:
-
isAfter
Checks if this year is after the specified year.- Parameters:
other
- the other year to compare to, not null- Returns:
- true if this is after the specified year
-
isBefore
Checks if this year is before the specified year.- Parameters:
other
- the other year to compare to, not null- Returns:
- true if this point is before the specified year
-
equals
-
hashCode
-
toString
-