Year

public final class Year extends Object
implements Temporal TemporalAdjuster Comparable<Year> Serializable

A year in the ISO-8601 calendar system, such as 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.

Constant Summary

int	MAX_VALUE	The maximum supported year, '+999,999,999'.
int	MIN_VALUE	The minimum supported year, '-999,999,999'.

Public Method Summary

Temporal	adjustInto(Temporal temporal) Adjusts the specified temporal object to have this year.
LocalDate	atDay(int dayOfYear) Combines this year with a day-of-year to create a LocalDate.
YearMonth	atMonth(int month) Combines this year with a month to create a YearMonth.
YearMonth	atMonth(Month month) Combines this year with a month to create a YearMonth.
LocalDate	atMonthDay(MonthDay monthDay) Combines this year with a month-day to create a LocalDate.
int	compareTo(Year other) Compares this year to another year.
boolean	equals(Object obj) Checks if this year is equal to another year.
String	format(DateTimeFormatter formatter) Formats this year using the specified formatter.
static Year	from(TemporalAccessor temporal) Obtains an instance of Year from a temporal object.
int	get(TemporalField field) Gets the value of the specified field from this year as an int.
long	getLong(TemporalField field) Gets the value of the specified field from this year as a long.
int	getValue() Gets the year value.
int	hashCode() A hash code for this year.
boolean	isAfter(Year other) Checks if this year is after the specified year.
boolean	isBefore(Year other) 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(TemporalUnit unit) Checks if the specified unit is supported.
boolean	isSupported(TemporalField field) Checks if the specified field 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.
Year	minus(TemporalAmount amountToSubtract) Returns a copy of this year with the specified amount subtracted.
Year	minus(long amountToSubtract, TemporalUnit unit) Returns a copy of this year with the specified amount subtracted.
Year	minusYears(long yearsToSubtract) Returns a copy of this Year with the specified number of years subtracted.
static Year	now(ZoneId zone) Obtains the current year from the system clock in the specified time-zone.
static Year	now() Obtains the current year from the system clock in the default time-zone.
static Year	now(Clock clock) Obtains the current year from the specified clock.
static Year	of(int isoYear) Obtains an instance of Year.
static Year	parse(CharSequence text, DateTimeFormatter formatter) Obtains an instance of Year from a text string using a specific formatter.
static Year	parse(CharSequence text) Obtains an instance of Year from a text string such as 2007.
Year	plus(TemporalAmount amountToAdd) Returns a copy of this year with the specified amount added.
Year	plus(long amountToAdd, TemporalUnit unit) Returns a copy of this year with the specified amount added.
Year	plusYears(long yearsToAdd) Returns a copy of this Year with the specified number of years added.
<R> R	query(TemporalQuery<R> query) Queries this year using the specified query.
ValueRange	range(TemporalField field) Gets the range of valid values for the specified field.
String	toString() Outputs this year as a String.
long	until(Temporal endExclusive, TemporalUnit unit) Calculates the amount of time until another year in terms of the specified unit.
Year	with(TemporalField field, long newValue) Returns a copy of this year with the specified field set to a new value.
Year	with(TemporalAdjuster adjuster) Returns an adjusted copy of this year.

Inherited Method Summary

From class java.lang.Object

Object	clone() Creates and returns a copy of this Object.
boolean	equals(Object obj) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of Class that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait(long timeout, int nanos) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait(long timeout) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
final void	wait() Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.

From interface java.time.temporal.Temporal

abstract boolean	isSupported(TemporalUnit unit) Checks if the specified unit is supported.
Temporal	minus(TemporalAmount amount) Returns an object of the same type as this object with an amount subtracted.
Temporal	minus(long amountToSubtract, TemporalUnit unit) Returns an object of the same type as this object with the specified period subtracted.
abstract Temporal	plus(long amountToAdd, TemporalUnit unit) Returns an object of the same type as this object with the specified period added.
Temporal	plus(TemporalAmount amount) Returns an object of the same type as this object with an amount added.
abstract long	until(Temporal endExclusive, TemporalUnit unit) Calculates the amount of time until another temporal in terms of the specified unit.
abstract Temporal	with(TemporalField field, long newValue) Returns an object of the same type as this object with the specified field altered.
Temporal	with(TemporalAdjuster adjuster) Returns an adjusted object of the same type as this object with the adjustment made.

From interface java.time.temporal.TemporalAdjuster

abstract Temporal

adjustInto(Temporal temporal) Adjusts the specified temporal object.

From interface java.lang.Comparable

abstract int

compareTo(Year o) Compares this object with the specified object for order.

From interface java.time.temporal.TemporalAccessor

int	get(TemporalField field) Gets the value of the specified field as an int.
abstract long	getLong(TemporalField field) Gets the value of the specified field as a long.
abstract boolean	isSupported(TemporalField field) Checks if the specified field is supported.
<R> R	query(TemporalQuery<R> query) Queries this date-time.
ValueRange	range(TemporalField field) Gets the range of valid values for the specified field.

Constants

public static final int MAX_VALUE

The maximum supported year, '+999,999,999'.

Constant Value: 999999999

public static final int MIN_VALUE

The minimum supported year, '-999,999,999'.

Constant Value: -999999999

Public Methods

public Temporal adjustInto (Temporal temporal)

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) passing ChronoField.YEAR as the field. If the specified temporal object does not use the ISO calendar system then a DateTimeException 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.

Parameters

temporal	the target object to be adjusted, not null

Returns

• the adjusted object, not null

Throws

DateTimeException	if unable to make the adjustment
ArithmeticException	if numeric overflow occurs

public LocalDate atDay (int dayOfYear)

Combines this year with a day-of-year to create a LocalDate.

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

public YearMonth atMonth (int month)

Combines this year with a month to create a YearMonth.

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

public YearMonth atMonth (Month month)

Combines this year with a month to create a YearMonth.

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

public LocalDate atMonthDay (MonthDay monthDay)

Combines this year with a month-day to create a LocalDate.

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

public int compareTo (Year other)

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.

Parameters

other	the other year to compare to, not null

Returns

• the comparator value, negative if less, positive if greater

public boolean equals (Object obj)

Checks if this year is equal to another year.

The comparison is based on the time-line position of the years.

Parameters

obj	the object to check, null returns false

Returns

• true if this is equal to the other year

public String format (DateTimeFormatter formatter)

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

public static Year from (TemporalAccessor temporal)

Obtains an instance of Year 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 of Year.

The conversion extracts the year field. The extraction is only permitted if the temporal object has an ISO chronology, or can be converted to a LocalDate.

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 a Year

public int get (TemporalField field)

Gets the value of the specified field from this year as an int.

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. The supported fields will return valid values based on this year. All other ChronoField instances will throw an UnsupportedTemporalTypeException.

If the field is not a ChronoField, then the result of this method is obtained by invoking TemporalField.getFrom(TemporalAccessor) passing this as the argument. Whether the value can be obtained, and what the value represents, is determined by the field.

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 field
UnsupportedTemporalTypeException	if the field is not supported or the range of values exceeds an int
ArithmeticException	if numeric overflow occurs

public long getLong (TemporalField field)

Gets the value of the specified field from this year as a long.

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. The supported fields will return valid values based on this year. All other ChronoField instances will throw an UnsupportedTemporalTypeException.

If the field is not a ChronoField, then the result of this method is obtained by invoking TemporalField.getFrom(TemporalAccessor) passing this as the argument. Whether the value can be obtained, and what the value represents, is determined by the field.

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
UnsupportedTemporalTypeException	if the field is not supported
ArithmeticException	if numeric overflow occurs

public int getValue ()

Gets the year value.

The year returned by this method is proleptic as per get(YEAR).

Returns

• the year, MIN_VALUE to MAX_VALUE

public int hashCode ()

A hash code for this year.

Returns

• a suitable hash code

public boolean isAfter (Year other)

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

public boolean isBefore (Year other)

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

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

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

public boolean isSupported (TemporalUnit unit)

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) and minus 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

All other ChronoUnit instances will return false.

If the unit is not a ChronoUnit, then the result of this method is obtained by invoking TemporalUnit.isSupportedBy(Temporal) passing this as the argument. Whether the unit is supported is determined by the unit.

Parameters

unit	the unit to check, null returns false

Returns

• true if the unit can be added/subtracted, false if not

public boolean isSupported (TemporalField field)

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 and with(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

All other ChronoField instances will return false.

If the field is not a ChronoField, then the result of this method is obtained by invoking TemporalField.isSupportedBy(TemporalAccessor) passing this as the argument. Whether the field is supported is determined by the field.

Parameters

field	the field to check, null returns false

Returns

• true if the field is supported on this year, false if not

public boolean isValidMonthDay (MonthDay monthDay)

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

public int length ()

Gets the length of this year in days.

Returns

• the length of this year in days, 365 or 366

public Year minus (TemporalAmount amountToSubtract)

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 typically Period but may be any other type implementing the TemporalAmount 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 to minus(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.

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 made
ArithmeticException	if numeric overflow occurs

public Year minus (long amountToSubtract, TemporalUnit unit)

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.

Parameters

amountToSubtract	the amount of the unit to subtract from the result, may be negative
unit	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 made
UnsupportedTemporalTypeException	if the unit is not supported
ArithmeticException	if numeric overflow occurs

public Year minusYears (long yearsToSubtract)

Returns a copy of this Year 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

public static Year now (ZoneId zone)

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

public static Year 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

public static Year now (Clock clock)

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

public static Year of (int isoYear)

Obtains an instance of Year.

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, from MIN_VALUE to MAX_VALUE

Returns

• the year, not null

Throws

DateTimeException	if the field is invalid

public static Year parse (CharSequence text, DateTimeFormatter formatter)

Obtains an instance of Year 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 null
formatter	the formatter to use, not null

Returns

• the parsed year, not null

Throws

DateTimeParseException	if the text cannot be parsed

public static Year parse (CharSequence text)

Obtains an instance of Year from a text string such as 2007.

The string must represent a valid year. Years outside the range 0000 to 9999 must be prefixed by the plus or minus symbol.

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

public Year plus (TemporalAmount amountToAdd)

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 typically Period but may be any other type implementing the TemporalAmount 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 to plus(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.

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 made
ArithmeticException	if numeric overflow occurs

public Year plus (long amountToAdd, TemporalUnit unit)

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 a Year with the specified number of years added. This is equivalent to plusYears(long).
• DECADES - Returns a Year with the specified number of decades added. This is equivalent to calling plusYears(long) with the amount multiplied by 10.
• CENTURIES - Returns a Year with the specified number of centuries added. This is equivalent to calling plusYears(long) with the amount multiplied by 100.
• MILLENNIA - Returns a Year with the specified number of millennia added. This is equivalent to calling plusYears(long) with the amount multiplied by 1,000.
• ERAS - Returns a Year 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 an UnsupportedTemporalTypeException.

If the field is not a ChronoUnit, then the result of this method is obtained by invoking TemporalUnit.addTo(Temporal, long) passing this 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.

Parameters

amountToAdd	the amount of the unit to add to the result, may be negative
unit	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 made
UnsupportedTemporalTypeException	if the unit is not supported
ArithmeticException	if numeric overflow occurs

public Year plusYears (long yearsToAdd)

Returns a copy of this Year 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

public R query (TemporalQuery<R> 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 passing this as the argument.

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)

public ValueRange range (TemporalField field)

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. The supported fields will return appropriate range instances. All other ChronoField instances will throw an UnsupportedTemporalTypeException.

If the field is not a ChronoField, then the result of this method is obtained by invoking TemporalField.rangeRefinedBy(TemporalAccessor) passing this as the argument. Whether the range can be obtained is determined by the field.

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 obtained
UnsupportedTemporalTypeException	if the field is not supported

public String toString ()

Outputs this year as a String.

Returns

• a string representation of this year, not null

public long until (Temporal endExclusive, TemporalUnit unit)

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 single TemporalUnit. The start and end points are this and the specified year. The result will be negative if the end is before the start. The Temporal passed to this method is converted to a Year using from(TemporalAccessor). For example, the amount in decades between two year can be calculated using startYear.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 units YEARS, DECADES, CENTURIES, MILLENNIA and ERAS are supported. Other ChronoUnit values will throw an exception.

If the unit is not a ChronoUnit, then the result of this method is obtained by invoking TemporalUnit.between(Temporal, Temporal) passing this as the first argument and the converted input temporal as the second argument.

This instance is immutable and unaffected by this method call.

Parameters

endExclusive	the end date, exclusive, which is converted to a Year, not null
unit	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 a Year
UnsupportedTemporalTypeException	if the unit is not supported
ArithmeticException	if numeric overflow occurs

public Year with (TemporalField field, long newValue)

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 a Year with the specified year-of-era The era will be unchanged.
• YEAR - Returns a Year with the specified year. This completely replaces the date and is equivalent to of(int).
• ERA - Returns a Year 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 an UnsupportedTemporalTypeException.

If the field is not a ChronoField, then the result of this method is obtained by invoking TemporalField.adjustInto(Temporal, long) passing this 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.

Parameters

field	the field to set in the result, not null
newValue	the new value of the field in the result

Returns

• a Year based on this with the specified field set, not null

Throws

DateTimeException	if the field cannot be set
UnsupportedTemporalTypeException	if the field is not supported
ArithmeticException	if numeric overflow occurs

public Year with (TemporalAdjuster adjuster)

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 passing this as the argument.

This instance is immutable and unaffected by this method call.

Parameters

adjuster	the adjuster to use, not null

Returns

• a Year based on this with the adjustment made, not null

Throws

DateTimeException	if the adjustment cannot be made
ArithmeticException	if numeric overflow occurs