- java.lang.Object
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- org.threeten.extra.DayOfMonth
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- All Implemented Interfaces:
Serializable
,Comparable<DayOfMonth>
,TemporalAccessor
,TemporalAdjuster
public final class DayOfMonth extends Object implements TemporalAccessor, TemporalAdjuster, Comparable<DayOfMonth>, Serializable
A day-of-month in the ISO-8601 calendar system.DayOfMonth
is an immutable date-time object that represents a day-of-month. It is a type-safe way of representing a day-of-month in an application. Any field that can be derived from a day-of-month can be obtained.This class does not store or represent a year, month, time or time-zone. For example, the value "21" can be stored in a
DayOfMonth
and would represent the 21st day of any month.Implementation Requirements:
This class is immutable and thread-safe.This class must be treated as a value type. Do not synchronize, rely on the identity hash code or use the distinction between equals() and ==.
- See Also:
- Serialized Form
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description Temporal
adjustInto(Temporal temporal)
Adjusts the specified temporal object to have this day-of-month.MonthDay
atMonth(int month)
Combines this day-of-month with a month to create aMonthDay
.MonthDay
atMonth(Month month)
Combines this day-of-month with a month to create aMonthDay
.LocalDate
atYearMonth(YearMonth yearMonth)
Combines this day-of-month with a year-month to create aLocalDate
.int
compareTo(DayOfMonth other)
Compares this day-of-month to another.boolean
equals(Object obj)
Checks if this day-of-month is equal to another day-of-month.static DayOfMonth
from(TemporalAccessor temporal)
Obtains an instance ofDayOfMonth
from a date-time object.int
get(TemporalField field)
Gets the value of the specified field from this day-of-month as anint
.long
getLong(TemporalField field)
Gets the value of the specified field from this day-of-month as along
.int
getValue()
Gets the day-of-month value.int
hashCode()
A hash code for this day-of-month.boolean
isSupported(TemporalField field)
Checks if the specified field is supported.boolean
isValidYearMonth(YearMonth yearMonth)
Checks if the year-month is valid for this year.static DayOfMonth
now()
Obtains the current day-of-month from the system clock in the default time-zone.static DayOfMonth
now(Clock clock)
Obtains the current day-of-month from the specified clock.static DayOfMonth
now(ZoneId zone)
Obtains the current day-of-month from the system clock in the specified time-zone.static DayOfMonth
of(int dayOfMonth)
Obtains an instance ofDayOfMonth
.<R> R
query(TemporalQuery<R> query)
Queries this day-of-month using the specified query.ValueRange
range(TemporalField field)
Gets the range of valid values for the specified field.String
toString()
Outputs this day-of-month as aString
.
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Method Detail
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now
public static DayOfMonth now()
Obtains the current day-of-month from the system clock in the default time-zone.This will query the
system clock
in the default time-zone to obtain the current day-of-month. The zone and offset will be set based on the time-zone in the clock.Using this method will prevent the ability to use an alternate clock for testing because the clock is hard-coded.
- Returns:
- the current day-of-month using the system clock and default time-zone, not null
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now
public static DayOfMonth now(ZoneId zone)
Obtains the current day-of-month from the system clock in the specified time-zone.This will query the
system clock
to obtain the current day-of-month. 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 day-of-month using the system clock, not null
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now
public static DayOfMonth now(Clock clock)
Obtains the current day-of-month from the specified clock.This will query the specified clock to obtain the current day-of-month. 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 day-of-month, not null
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of
public static DayOfMonth of(int dayOfMonth)
Obtains an instance ofDayOfMonth
.A day-of-month object represents one of the 31 days of the month, from 1 to 31.
- Parameters:
dayOfMonth
- the day-of-month to represent, from 1 to 31- Returns:
- the day-of-month, not null
- Throws:
DateTimeException
- if the day-of-month is invalid
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from
public static DayOfMonth from(TemporalAccessor temporal)
Obtains an instance ofDayOfMonth
from a date-time object.This obtains a day-of-month based on the specified temporal. A
TemporalAccessor
represents an arbitrary set of date and time information, which this factory converts to an instance ofDayOfMonth
.The conversion extracts the
day-of-month
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 in queries via method reference,DayOfMonth::from
.- Parameters:
temporal
- the temporal object to convert, not null- Returns:
- the day-of-month, not null
- Throws:
DateTimeException
- if unable to convert to aDayOfMonth
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getValue
public int getValue()
Gets the day-of-month value.- Returns:
- the day-of-month, from 1 to 31
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isSupported
public boolean isSupported(TemporalField field)
Checks if the specified field is supported.This checks if this day-of-month can be queried for the specified field. If false, then calling the
range
,get
andgetLong
methods will throw an exception.If the field is a
ChronoField
then the query is implemented here. The supported fields are:DAY_OF_MONTH
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 day-of-month, false if not
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range
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 day-of-month 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
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get
public int get(TemporalField field)
Gets the value of the specified field from this day-of-month as anint
.This queries this day-of-month 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. Thesupported fields
will return valid values based on this day-of-month. 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
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getLong
public long getLong(TemporalField field)
Gets the value of the specified field from this day-of-month as along
.This queries this day-of-month 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. Thesupported fields
will return valid values based on this day-of-month. 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
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isValidYearMonth
public boolean isValidYearMonth(YearMonth yearMonth)
Checks if the year-month is valid for this year.This method checks whether this day and the input year and month form a valid date.
- Parameters:
yearMonth
- the year month to validate, null returns false- Returns:
- true if the year and month are valid for this day
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query
public <R> R query(TemporalQuery<R> query)
Queries this day-of-month using the specified query.This queries this day-of-month 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)
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adjustInto
public Temporal adjustInto(Temporal temporal)
Adjusts the specified temporal object to have this day-of-month.This returns a temporal object of the same observable type as the input with the day-of-month changed to be the same as this.
The adjustment is equivalent to using
Temporal.with(TemporalField, long)
passingChronoField.DAY_OF_MONTH
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 = thisDay.adjustInto(temporal); temporal = temporal.with(thisDay);
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
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atMonth
public MonthDay atMonth(Month month)
Combines this day-of-month with a month to create aMonthDay
.This returns a
MonthDay
formed from this day and the specified month.This method can be used as part of a chain to produce a date:
LocalDate date = day.atMonth(month).atYear(year);
If this day-of-month is invalid for the month then it will be changed to the last valid date for the month.
- Parameters:
month
- the month-of-year to use, not null- Returns:
- the year-month formed from this year and the specified month, not null
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atMonth
public MonthDay atMonth(int month)
Combines this day-of-month with a month to create aMonthDay
.This returns a
MonthDay
formed from this day and the specified month.This method can be used as part of a chain to produce a date:
LocalDate date = day.atMonth(month).atYear(year);
If this day-of-month is invalid for the month then it will be changed to the last valid date for the month.
- 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
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atYearMonth
public LocalDate atYearMonth(YearMonth yearMonth)
Combines this day-of-month with a year-month to create aLocalDate
.This returns a
LocalDate
formed from this year and the specified year-month.If this day-of-month is invalid for the year-month then it will be changed to the last valid date for the month.
- Parameters:
yearMonth
- the year-month to use, not null- Returns:
- the local date formed from this year and the specified year-month, not null
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compareTo
public int compareTo(DayOfMonth other)
Compares this day-of-month to another.The comparison is based on the value of the day. It is "consistent with equals", as defined by
Comparable
.- Specified by:
compareTo
in interfaceComparable<DayOfMonth>
- Parameters:
other
- the other day-of-month instance, not null- Returns:
- the comparator value, negative if less, positive if greater
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equals
public boolean equals(Object obj)
Checks if this day-of-month is equal to another day-of-month.
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hashCode
public int hashCode()
A hash code for this day-of-month.
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