Year
Related Docs:
object Year
| package time
Adjusts the specified temporal object to have this year.
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 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.
the target object to be adjusted, not null
the adjusted object, not null
ArithmeticException if numeric overflow occurs
DateTimeException if unable to make the adjustment
Combines this year with a day-of-year to create a LocalDate.
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.
the day-of-year to use, not null
the local date formed from this year and the specified date of year, not null
DateTimeException if the day of year is zero or less, 366 or greater or equal
to 366 and this is not a leap year
Combines this year with a month to create a YearMonth.
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);
the month-of-year to use, from 1 (January) to 12 (December)
the year-month formed from this year and the specified month, not null
DateTimeException if the month is invalid
Combines this year with a month to create a YearMonth.
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);
the month-of-year to use, not null
the year-month formed from this year and the specified month, not null
Combines this year with a month-day to create a LocalDate.
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.
the month-day to use, not null
the local date formed from this year and the specified month-day, not null
Compares this year to another year.
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.
the other year to compare to, not null
the comparator value, negative if less, positive if greater
Checks if this year is equal to another year.
Checks if this year is equal to another year.
The comparison is based on the time-line position of the years.
the object to check, null returns false
true if this is equal to the other year
Outputs this year as a String using the formatter.
Outputs this year as a String using the formatter.
This year will be passed to the formatter
print method.
the formatter to use, not null
the formatted year string, not null
DateTimeException if an error occurs during printing
Gets the value of the specified field from this year as an int.
Gets the value of the specified field from this year as an int.
This queries this year for the value for 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 a DateTimeException.
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.
the field to get, not null
the value for the field
ArithmeticException if numeric overflow occurs
DateTimeException if a value for the field cannot be obtained
Gets the value of the specified field from this year as a long.
Gets the value of the specified field from this year as a long.
This queries this year for the value for 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 a DateTimeException.
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.
the field to get, not null
the value for the field
ArithmeticException if numeric overflow occurs
DateTimeException if a value for the field cannot be obtained
Gets the year value.
Gets the year value.
The year returned by this method is proleptic as per get(YEAR).
the year, { @code MIN_VALUE} to { @code MAX_VALUE}
A hash code for this year.
Is this year after the specified year.
Is this year after the specified year.
the other year to compare to, not null
true if this is after the specified year
Is this year before the specified year.
Is this year before the specified year.
the other year to compare to, not null
true if this point is before the specified year
Checks if the year is a leap year, according to the ISO proleptic calendar system rules.
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.
true if the year is leap, false otherwise
Checks if the specified unit is supported.
Checks if the specified unit is supported.
This checks if the date-time can be queried for the specified unit.
If false, then calling the plus and minus
methods will throw an exception.
Implementations must check and handle all fields defined in ChronoUnit.
If the field is supported, then true is returned, otherwise false
If the field is not a ChronoUnit, then the result of this method
is obtained by invoking TemporalUnit.isSupportedBy(Temporal)
passing this as the argument.
Implementations must not alter this object.
the unit to check, null returns false
true if this date-time can be queried for the unit, false if not
Checks if the specified field is supported.
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 and
get methods will throw an exception.
If the field is a ChronoField then the query is implemented here.
The supported fields will return valid
values based on this date-time.
The supported fields are:
YEAR_OF_ERAYEARERAAll 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.
the field to check, null returns false
true if the field is supported on this year, false if not
Checks if the month-day is valid for this year.
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.
the month-day to validate, null returns false
true if the month and day are valid for this year
Gets the length of this year in days.
Gets the length of this year in days.
the length of this year in days, 365 or 366
Returns an object of the same type as this object with the specified period subtracted.
Returns an object of the same type as this object with the specified period subtracted.
This method returns a new object based on this one with the specified period subtracted.
For example, on a LocalDate, this could be used to subtract a number of years, months or days.
The returned object will have the same observable type as this object.
In some cases, changing a field is not fully defined. For example, if the target object is a date representing the 31st March, then subtracting one month would be unclear. In cases like this, the field is responsible for resolving the result. Typically it will choose the previous valid date, which would be the last valid day of February in this example.
If the implementation represents a date-time that has boundaries, such as LocalTime,
then the permitted units must include the boundary unit, but no multiples of the boundary unit.
For example, LocalTime must accept DAYS but not WEEKS or MONTHS.
Implementations must behave in a manor equivalent to the default method behavior.
Implementations must not alter either this object or the specified temporal object. Instead, an adjusted copy of the original must be returned. This provides equivalent, safe behavior for immutable and mutable implementations.
the amount of the specified unit to subtract, may be negative
the unit of the period to subtract, not null
an object of the same type with the specified period subtracted, not null
ArithmeticException { @inheritDoc}
DateTimeException { @inheritDoc}
Returns a copy of this year with the specified period subtracted.
Returns a copy of this year with the specified period subtracted.
This method returns a new year based on this year with the specified period subtracted.
The subtractor is typically Period but may be any other type implementing
the TemporalAmount interface.
The calculation is delegated to the specified adjuster, which typically calls
back to TemporalUnit).
This instance is immutable and unaffected by this method call.
the amount to subtract, not null
a { @code Year} based on this year with the subtraction made, not null
ArithmeticException if numeric overflow occurs
DateTimeException if the subtraction cannot be made
Returns a copy of this year with the specified number of years subtracted.
Returns a copy of this year with the specified number of years subtracted.
This instance is immutable and unaffected by this method call.
the years to subtract, may be negative
a { @code Year} based on this year with the period subtracted, not null
DateTimeException if the result exceeds the supported year range
Returns an object of the same type as this object with the specified period added.
Returns an object of the same type as this object with the specified period added.
This method returns a new object based on this one with the specified period added.
For example, on a LocalDate, this could be used to add a number of years, months or days.
The returned object will have the same observable type as this object.
In some cases, changing a field is not fully defined. For example, if the target object is a date representing the 31st January, then adding one month would be unclear. In cases like this, the field is responsible for resolving the result. Typically it will choose the previous valid date, which would be the last valid day of February in this example.
If the implementation represents a date-time that has boundaries, such as LocalTime,
then the permitted units must include the boundary unit, but no multiples of the boundary unit.
For example, LocalTime must accept DAYS but not WEEKS or MONTHS.
Implementations must check and handle all units defined in ChronoUnit.
If the unit is supported, then the addition must be performed.
If unsupported, then a DateTimeException must be thrown.
If the unit is not a ChronoUnit, then the result of this method
is obtained by invoking TemporalUnit.addTo(Temporal, long)
passing this as the first argument.
Implementations must not alter either this object or the specified temporal object. Instead, an adjusted copy of the original must be returned. This provides equivalent, safe behavior for immutable and mutable implementations.
the amount of the specified unit to add, may be negative
the unit of the period to add, not null
an object of the same type with the specified period added, not null
ArithmeticException { @inheritDoc}
DateTimeException { @inheritDoc}
Returns a copy of this year with the specified period added.
Returns a copy of this year with the specified period added.
This method returns a new year based on this year with the specified period added.
The adder is typically Period but may be any other type implementing
the TemporalAmount interface.
The calculation is delegated to the specified adjuster, which typically calls
back to TemporalUnit).
This instance is immutable and unaffected by this method call.
the amount to add, not null
a { @code Year} based on this year with the addition made, not null
ArithmeticException if numeric overflow occurs
DateTimeException if the addition cannot be made
Returns a copy of this year with the specified number of years added.
Returns a copy of this year with the specified number of years added.
This instance is immutable and unaffected by this method call.
the years to add, may be negative
a { @code Year} based on this year with the period added, not null
DateTimeException if the result exceeds the supported year range
Queries this year using the specified 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.
the type of the result
the query to invoke, not null
the query result, null may be returned (defined by the query)
ArithmeticException if numeric overflow occurs (defined by the query)
DateTimeException if unable to query (defined by the query)
Gets the range of valid values for the specified 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 a DateTimeException.
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.
the field to query the range for, not null
the range of valid values for the field, not null
DateTimeException if the range for the field cannot be obtained
Outputs this year as a String.
Outputs this year as a String.
a string representation of this year, not null
Calculates the period between this year and another year in terms of the specified unit.
Calculates the period between this year and another year in terms of the specified unit.
This calculates the period between two years in terms of a single unit.
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 must be a Year.
For example, the period 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 period in decades between 2012 and 2031 will only be one decade as it is one year short of two decades.
This method operates in association with TemporalUnit#between.
The result of this method is a long representing the amount of
the specified unit. By contrast, the result of between is an
object that can be used directly in addition/subtraction:
long period = start.until(end, YEARS); // this method dateTime.plus(YEARS.between(start, end)); // use in plus/minus
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 input temporal as
the second argument.
This instance is immutable and unaffected by this method call.
the end year, which is converted to a { @code Year}, not null
the unit to measure the period in, not null
the amount of the period between this year and the end year
ArithmeticException if numeric overflow occurs
DateTimeException if the period cannot be calculated
Returns a copy of this year with the specified field set to a new value.
Returns a copy of this year with the specified field set to a new value.
This returns a new 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 a DateTimeException.
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.
the field to set in the result, not null
the new value of the field in the result
a { @code Year} based on { @code this} with the specified field set, not null
ArithmeticException if numeric overflow occurs
DateTimeException if the field cannot be set
Returns an adjusted copy of this year.
Returns an adjusted copy of this year.
This returns a new 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.
the adjuster to use, not null
a { @code Year} based on { @code this} with the adjustment made, not null
ArithmeticException if numeric overflow occurs
DateTimeException if the adjustment cannot be made
A year in the ISO-8601 calendar system, such as
2007.Yearis 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.
Specification for implementors
This class is immutable and thread-safe.