Class LocalDateTime
- All Implemented Interfaces:
Serializable
,Comparable<ChronoLocalDateTime<?>>
,ChronoLocalDateTime<LocalDate>
,Temporal
,TemporalAccessor
,TemporalAdjuster
2007-12-03T10:15:30
.
LocalDateTime
is an immutable date-time object that represents a date-time,
often viewed as year-month-day-hour-minute-second. Other date and time fields,
such as day-of-year, day-of-week and week-of-year, can also be accessed.
Time is represented to nanosecond precision.
For example, the value "2nd October 2007 at 13:45.30.123456789" can be
stored in a LocalDateTime
.
This class does not store or represent a time-zone. Instead, it is a description of the date, as used for birthdays, combined with the local time as seen on a wall clock. It cannot represent an instant on the time-line without additional information such as an offset or time-zone.
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
Modifier and TypeFieldDescriptionstatic final LocalDateTime
The maximum supportedLocalDateTime
, '+999999999-12-31T23:59:59.999999999'.static final LocalDateTime
The minimum supportedLocalDateTime
, '-999999999-01-01T00:00:00'. -
Method Summary
Modifier and TypeMethodDescriptionadjustInto
(Temporal temporal) Adjusts the specified temporal object to have the same date and time as this object.atOffset
(ZoneOffset offset) Combines this date-time with an offset to create anOffsetDateTime
.Combines this date-time with a time-zone to create aZonedDateTime
.int
compareTo
(ChronoLocalDateTime<?> other) Compares this date-time to another date-time.boolean
Checks if this date-time is equal to another date-time.format
(DateTimeFormatter formatter) Formats this date-time using the specified formatter.static LocalDateTime
from
(TemporalAccessor temporal) Obtains an instance ofLocalDateTime
from a temporal object.int
get
(TemporalField field) Gets the value of the specified field from this date-time as anint
.int
Gets the day-of-month field.Gets the day-of-week field, which is an enumDayOfWeek
.int
Gets the day-of-year field.int
getHour()
Gets the hour-of-day field.long
getLong
(TemporalField field) Gets the value of the specified field from this date-time as along
.int
Gets the minute-of-hour field.getMonth()
Gets the month-of-year field using theMonth
enum.int
Gets the month-of-year field from 1 to 12.int
getNano()
Gets the nano-of-second field.int
Gets the second-of-minute field.int
getYear()
Gets the year field.int
hashCode()
A hash code for this date-time.boolean
isAfter
(ChronoLocalDateTime<?> other) Checks if this date-time is after the specified date-time.boolean
isBefore
(ChronoLocalDateTime<?> other) Checks if this date-time is before the specified date-time.boolean
isEqual
(ChronoLocalDateTime<?> other) Checks if this date-time is equal to the specified date-time.boolean
isSupported
(TemporalField field) Checks if the specified field is supported.boolean
isSupported
(TemporalUnit unit) Checks if the specified unit is supported.minus
(long amountToSubtract, TemporalUnit unit) Returns a copy of this date-time with the specified amount subtracted.minus
(TemporalAmount amountToSubtract) Returns a copy of this date-time with the specified amount subtracted.minusDays
(long days) Returns a copy of thisLocalDateTime
with the specified number of days subtracted.minusHours
(long hours) Returns a copy of thisLocalDateTime
with the specified number of hours subtracted.minusMinutes
(long minutes) Returns a copy of thisLocalDateTime
with the specified number of minutes subtracted.minusMonths
(long months) Returns a copy of thisLocalDateTime
with the specified number of months subtracted.minusNanos
(long nanos) Returns a copy of thisLocalDateTime
with the specified number of nanoseconds subtracted.minusSeconds
(long seconds) Returns a copy of thisLocalDateTime
with the specified number of seconds subtracted.minusWeeks
(long weeks) Returns a copy of thisLocalDateTime
with the specified number of weeks subtracted.minusYears
(long years) Returns a copy of thisLocalDateTime
with the specified number of years subtracted.static LocalDateTime
now()
Obtains the current date-time from the system clock in the default time-zone.static LocalDateTime
Obtains the current date-time from the specified clock.static LocalDateTime
Obtains the current date-time from the system clock in the specified time-zone.static LocalDateTime
of
(int year, int month, int dayOfMonth, int hour, int minute) Obtains an instance ofLocalDateTime
from year, month, day, hour and minute, setting the second and nanosecond to zero.static LocalDateTime
of
(int year, int month, int dayOfMonth, int hour, int minute, int second) Obtains an instance ofLocalDateTime
from year, month, day, hour, minute and second, setting the nanosecond to zero.static LocalDateTime
of
(int year, int month, int dayOfMonth, int hour, int minute, int second, int nanoOfSecond) Obtains an instance ofLocalDateTime
from year, month, day, hour, minute, second and nanosecond.static LocalDateTime
Obtains an instance ofLocalDateTime
from year, month, day, hour and minute, setting the second and nanosecond to zero.static LocalDateTime
Obtains an instance ofLocalDateTime
from year, month, day, hour, minute and second, setting the nanosecond to zero.static LocalDateTime
Obtains an instance ofLocalDateTime
from year, month, day, hour, minute, second and nanosecond.static LocalDateTime
Obtains an instance ofLocalDateTime
from a date and time.static LocalDateTime
ofEpochSecond
(long epochSecond, int nanoOfSecond, ZoneOffset offset) Obtains an instance ofLocalDateTime
using seconds from the epoch of 1970-01-01T00:00:00Z.static LocalDateTime
Obtains an instance ofLocalDateTime
from anInstant
and zone ID.static LocalDateTime
parse
(CharSequence text) Obtains an instance ofLocalDateTime
from a text string such as2007-12-03T10:15:30
.static LocalDateTime
parse
(CharSequence text, DateTimeFormatter formatter) Obtains an instance ofLocalDateTime
from a text string using a specific formatter.plus
(long amountToAdd, TemporalUnit unit) Returns a copy of this date-time with the specified amount added.plus
(TemporalAmount amountToAdd) Returns a copy of this date-time with the specified amount added.plusDays
(long days) Returns a copy of thisLocalDateTime
with the specified number of days added.plusHours
(long hours) Returns a copy of thisLocalDateTime
with the specified number of hours added.plusMinutes
(long minutes) Returns a copy of thisLocalDateTime
with the specified number of minutes added.plusMonths
(long months) Returns a copy of thisLocalDateTime
with the specified number of months added.plusNanos
(long nanos) Returns a copy of thisLocalDateTime
with the specified number of nanoseconds added.plusSeconds
(long seconds) Returns a copy of thisLocalDateTime
with the specified number of seconds added.plusWeeks
(long weeks) Returns a copy of thisLocalDateTime
with the specified number of weeks added.plusYears
(long years) Returns a copy of thisLocalDateTime
with the specified number of years added.<R> R
query
(TemporalQuery<R> query) Queries this date-time using the specified query.range
(TemporalField field) Gets the range of valid values for the specified field.Gets theLocalDate
part of this date-time.Gets theLocalTime
part of this date-time.toString()
Outputs this date-time as aString
, such as2007-12-03T10:15:30
.truncatedTo
(TemporalUnit unit) Returns a copy of thisLocalDateTime
with the time truncated.long
until
(Temporal endExclusive, TemporalUnit unit) Calculates the amount of time until another date-time in terms of the specified unit.with
(TemporalAdjuster adjuster) Returns an adjusted copy of this date-time.with
(TemporalField field, long newValue) Returns a copy of this date-time with the specified field set to a new value.withDayOfMonth
(int dayOfMonth) Returns a copy of thisLocalDateTime
with the day-of-month altered.withDayOfYear
(int dayOfYear) Returns a copy of thisLocalDateTime
with the day-of-year altered.withHour
(int hour) Returns a copy of thisLocalDateTime
with the hour-of-day altered.withMinute
(int minute) Returns a copy of thisLocalDateTime
with the minute-of-hour altered.withMonth
(int month) Returns a copy of thisLocalDateTime
with the month-of-year altered.withNano
(int nanoOfSecond) Returns a copy of thisLocalDateTime
with the nano-of-second altered.withSecond
(int second) Returns a copy of thisLocalDateTime
with the second-of-minute altered.withYear
(int year) Returns a copy of thisLocalDateTime
with the year altered.Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
Methods inherited from interface java.time.chrono.ChronoLocalDateTime
getChronology, toEpochSecond, toInstant
-
Field Details
-
MIN
The minimum supportedLocalDateTime
, '-999999999-01-01T00:00:00'. This is the local date-time of midnight at the start of the minimum date. This combinesLocalDate.MIN
andLocalTime.MIN
. This could be used by an application as a "far past" date-time. -
MAX
The maximum supportedLocalDateTime
, '+999999999-12-31T23:59:59.999999999'. This is the local date-time just before midnight at the end of the maximum date. This combinesLocalDate.MAX
andLocalTime.MAX
. This could be used by an application as a "far future" date-time.
-
-
Method Details
-
now
Obtains the current date-time from the system clock in the default time-zone.This will query the
system clock
in the default time-zone to obtain the current date-time.Using this method will prevent the ability to use an alternate clock for testing because the clock is hard-coded.
- Returns:
- the current date-time using the system clock and default time-zone, not null
-
now
Obtains the current date-time from the system clock in the specified time-zone.This will query the
system clock
to obtain the current date-time. 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 date-time using the system clock, not null
-
now
Obtains the current date-time from the specified clock.This will query the specified clock to obtain the current date-time. 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 date-time, not null
-
of
Obtains an instance ofLocalDateTime
from year, month, day, hour and minute, setting the second and nanosecond to zero.This returns a
LocalDateTime
with the specified year, month, day-of-month, hour and minute. The day must be valid for the year and month, otherwise an exception will be thrown. The second and nanosecond fields will be set to zero.- Parameters:
year
- the year to represent, from MIN_YEAR to MAX_YEARmonth
- the month-of-year to represent, not nulldayOfMonth
- the day-of-month to represent, from 1 to 31hour
- the hour-of-day to represent, from 0 to 23minute
- the minute-of-hour to represent, from 0 to 59- Returns:
- the local date-time, not null
- Throws:
DateTimeException
- if the value of any field is out of range, or if the day-of-month is invalid for the month-year
-
of
public static LocalDateTime of(int year, Month month, int dayOfMonth, int hour, int minute, int second) Obtains an instance ofLocalDateTime
from year, month, day, hour, minute and second, setting the nanosecond to zero.This returns a
LocalDateTime
with the specified year, month, day-of-month, hour, minute and second. The day must be valid for the year and month, otherwise an exception will be thrown. The nanosecond field will be set to zero.- Parameters:
year
- the year to represent, from MIN_YEAR to MAX_YEARmonth
- the month-of-year to represent, not nulldayOfMonth
- the day-of-month to represent, from 1 to 31hour
- the hour-of-day to represent, from 0 to 23minute
- the minute-of-hour to represent, from 0 to 59second
- the second-of-minute to represent, from 0 to 59- Returns:
- the local date-time, not null
- Throws:
DateTimeException
- if the value of any field is out of range, or if the day-of-month is invalid for the month-year
-
of
public static LocalDateTime of(int year, Month month, int dayOfMonth, int hour, int minute, int second, int nanoOfSecond) Obtains an instance ofLocalDateTime
from year, month, day, hour, minute, second and nanosecond.This returns a
LocalDateTime
with the specified year, month, day-of-month, hour, minute, second and nanosecond. The day must be valid for the year and month, otherwise an exception will be thrown.- Parameters:
year
- the year to represent, from MIN_YEAR to MAX_YEARmonth
- the month-of-year to represent, not nulldayOfMonth
- the day-of-month to represent, from 1 to 31hour
- the hour-of-day to represent, from 0 to 23minute
- the minute-of-hour to represent, from 0 to 59second
- the second-of-minute to represent, from 0 to 59nanoOfSecond
- the nano-of-second to represent, from 0 to 999,999,999- Returns:
- the local date-time, not null
- Throws:
DateTimeException
- if the value of any field is out of range, or if the day-of-month is invalid for the month-year
-
of
Obtains an instance ofLocalDateTime
from year, month, day, hour and minute, setting the second and nanosecond to zero.This returns a
LocalDateTime
with the specified year, month, day-of-month, hour and minute. The day must be valid for the year and month, otherwise an exception will be thrown. The second and nanosecond fields will be set to zero.- Parameters:
year
- the year to represent, from MIN_YEAR to MAX_YEARmonth
- the month-of-year to represent, from 1 (January) to 12 (December)dayOfMonth
- the day-of-month to represent, from 1 to 31hour
- the hour-of-day to represent, from 0 to 23minute
- the minute-of-hour to represent, from 0 to 59- Returns:
- the local date-time, not null
- Throws:
DateTimeException
- if the value of any field is out of range, or if the day-of-month is invalid for the month-year
-
of
public static LocalDateTime of(int year, int month, int dayOfMonth, int hour, int minute, int second) Obtains an instance ofLocalDateTime
from year, month, day, hour, minute and second, setting the nanosecond to zero.This returns a
LocalDateTime
with the specified year, month, day-of-month, hour, minute and second. The day must be valid for the year and month, otherwise an exception will be thrown. The nanosecond field will be set to zero.- Parameters:
year
- the year to represent, from MIN_YEAR to MAX_YEARmonth
- the month-of-year to represent, from 1 (January) to 12 (December)dayOfMonth
- the day-of-month to represent, from 1 to 31hour
- the hour-of-day to represent, from 0 to 23minute
- the minute-of-hour to represent, from 0 to 59second
- the second-of-minute to represent, from 0 to 59- Returns:
- the local date-time, not null
- Throws:
DateTimeException
- if the value of any field is out of range, or if the day-of-month is invalid for the month-year
-
of
public static LocalDateTime of(int year, int month, int dayOfMonth, int hour, int minute, int second, int nanoOfSecond) Obtains an instance ofLocalDateTime
from year, month, day, hour, minute, second and nanosecond.This returns a
LocalDateTime
with the specified year, month, day-of-month, hour, minute, second and nanosecond. The day must be valid for the year and month, otherwise an exception will be thrown.- Parameters:
year
- the year to represent, from MIN_YEAR to MAX_YEARmonth
- the month-of-year to represent, from 1 (January) to 12 (December)dayOfMonth
- the day-of-month to represent, from 1 to 31hour
- the hour-of-day to represent, from 0 to 23minute
- the minute-of-hour to represent, from 0 to 59second
- the second-of-minute to represent, from 0 to 59nanoOfSecond
- the nano-of-second to represent, from 0 to 999,999,999- Returns:
- the local date-time, not null
- Throws:
DateTimeException
- if the value of any field is out of range, or if the day-of-month is invalid for the month-year
-
of
Obtains an instance ofLocalDateTime
from a date and time.- Parameters:
date
- the local date, not nulltime
- the local time, not null- Returns:
- the local date-time, not null
-
ofInstant
Obtains an instance ofLocalDateTime
from anInstant
and zone ID.This creates a local date-time based on the specified instant. First, the offset from UTC/Greenwich is obtained using the zone ID and instant, which is simple as there is only one valid offset for each instant. Then, the instant and offset are used to calculate the local date-time.
- Parameters:
instant
- the instant to create the date-time from, not nullzone
- the time-zone, which may be an offset, not null- Returns:
- the local date-time, not null
- Throws:
DateTimeException
- if the result exceeds the supported range
-
ofEpochSecond
Obtains an instance ofLocalDateTime
using seconds from the epoch of 1970-01-01T00:00:00Z.This allows the
epoch-second
field to be converted to a local date-time. This is primarily intended for low-level conversions rather than general application usage.- Parameters:
epochSecond
- the number of seconds from the epoch of 1970-01-01T00:00:00ZnanoOfSecond
- the nanosecond within the second, from 0 to 999,999,999offset
- the zone offset, not null- Returns:
- the local date-time, not null
- Throws:
DateTimeException
- if the result exceeds the supported range, or if the nano-of-second is invalid
-
from
Obtains an instance ofLocalDateTime
from a temporal object.This obtains a local date-time based on the specified temporal. A
TemporalAccessor
represents an arbitrary set of date and time information, which this factory converts to an instance ofLocalDateTime
.The conversion extracts and combines the
LocalDate
and theLocalTime
from the temporal object. Implementations are permitted to perform optimizations such as accessing those fields that are equivalent to the relevant objects.This method matches the signature of the functional interface
TemporalQuery
allowing it to be used as a query via method reference,LocalDateTime::from
.- Parameters:
temporal
- the temporal object to convert, not null- Returns:
- the local date-time, not null
- Throws:
DateTimeException
- if unable to convert to aLocalDateTime
-
parse
Obtains an instance ofLocalDateTime
from a text string such as2007-12-03T10:15:30
.The string must represent a valid date-time and is parsed using
DateTimeFormatter.ISO_LOCAL_DATE_TIME
.- Parameters:
text
- the text to parse such as "2007-12-03T10:15:30", not null- Returns:
- the parsed local date-time, not null
- Throws:
DateTimeParseException
- if the text cannot be parsed
-
parse
Obtains an instance ofLocalDateTime
from a text string using a specific formatter.The text is parsed using the formatter, returning a date-time.
- Parameters:
text
- the text to parse, not nullformatter
- the formatter to use, not null- Returns:
- the parsed local date-time, not null
- Throws:
DateTimeParseException
- if the text cannot be parsed
-
isSupported
Checks if the specified field is supported.This checks if this date-time 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:NANO_OF_SECOND
NANO_OF_DAY
MICRO_OF_SECOND
MICRO_OF_DAY
MILLI_OF_SECOND
MILLI_OF_DAY
SECOND_OF_MINUTE
SECOND_OF_DAY
MINUTE_OF_HOUR
MINUTE_OF_DAY
HOUR_OF_AMPM
CLOCK_HOUR_OF_AMPM
HOUR_OF_DAY
CLOCK_HOUR_OF_DAY
AMPM_OF_DAY
DAY_OF_WEEK
ALIGNED_DAY_OF_WEEK_IN_MONTH
ALIGNED_DAY_OF_WEEK_IN_YEAR
DAY_OF_MONTH
DAY_OF_YEAR
EPOCH_DAY
ALIGNED_WEEK_OF_MONTH
ALIGNED_WEEK_OF_YEAR
MONTH_OF_YEAR
PROLEPTIC_MONTH
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 interfaceChronoLocalDateTime<LocalDate>
- Specified by:
isSupported
in interfaceTemporalAccessor
- Parameters:
field
- the field to check, null returns false- Returns:
- true if the field is supported on this date-time, 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 date-time. 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:NANOS
MICROS
MILLIS
SECONDS
MINUTES
HOURS
HALF_DAYS
DAYS
WEEKS
MONTHS
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 interfaceChronoLocalDateTime<LocalDate>
- 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 date-time 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 date-time as anint
.This queries this date-time 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 date-time, exceptNANO_OF_DAY
,MICRO_OF_DAY
,EPOCH_DAY
andPROLEPTIC_MONTH
which are too large to fit in anint
and throw anUnsupportedTemporalTypeException
. 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 date-time as along
.This queries this date-time 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 date-time. 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
-
toLocalDate
Gets theLocalDate
part of this date-time.This returns a
LocalDate
with the same year, month and day as this date-time.- Specified by:
toLocalDate
in interfaceChronoLocalDateTime<LocalDate>
- Returns:
- the date part of this date-time, not null
-
getYear
public int getYear()Gets the year field.This method returns the primitive
int
value for the year.The year returned by this method is proleptic as per
get(YEAR)
. To obtain the year-of-era, useget(YEAR_OF_ERA)
.- Returns:
- the year, from MIN_YEAR to MAX_YEAR
-
getMonthValue
public int getMonthValue()Gets the month-of-year field from 1 to 12.This method returns the month as an
int
from 1 to 12. Application code is frequently clearer if the enumMonth
is used by callinggetMonth()
.- Returns:
- the month-of-year, from 1 to 12
- See Also:
-
getMonth
-
getDayOfMonth
public int getDayOfMonth()Gets the day-of-month field.This method returns the primitive
int
value for the day-of-month.- Returns:
- the day-of-month, from 1 to 31
-
getDayOfYear
public int getDayOfYear()Gets the day-of-year field.This method returns the primitive
int
value for the day-of-year.- Returns:
- the day-of-year, from 1 to 365, or 366 in a leap year
-
getDayOfWeek
Gets the day-of-week field, which is an enumDayOfWeek
.This method returns the enum
DayOfWeek
for the day-of-week. This avoids confusion as to whatint
values mean. If you need access to the primitiveint
value then the enum provides theint value
.Additional information can be obtained from the
DayOfWeek
. This includes textual names of the values.- Returns:
- the day-of-week, not null
-
toLocalTime
Gets theLocalTime
part of this date-time.This returns a
LocalTime
with the same hour, minute, second and nanosecond as this date-time.- Specified by:
toLocalTime
in interfaceChronoLocalDateTime<LocalDate>
- Returns:
- the time part of this date-time, not null
-
getHour
public int getHour()Gets the hour-of-day field.- Returns:
- the hour-of-day, from 0 to 23
-
getMinute
public int getMinute()Gets the minute-of-hour field.- Returns:
- the minute-of-hour, from 0 to 59
-
getSecond
public int getSecond()Gets the second-of-minute field.- Returns:
- the second-of-minute, from 0 to 59
-
getNano
public int getNano()Gets the nano-of-second field.- Returns:
- the nano-of-second, from 0 to 999,999,999
-
with
Returns an adjusted copy of this date-time.This returns a
LocalDateTime
, based on this one, with the date-time adjusted. The adjustment takes place using the specified adjuster strategy object. Read the documentation of the adjuster to understand what adjustment will be made.A simple adjuster might simply set the one of the fields, such as the year field. A more complex adjuster might set the date to the last day of the month.
A selection of common adjustments is provided in
TemporalAdjusters
. These include finding the "last day of the month" and "next Wednesday". Key date-time classes also implement theTemporalAdjuster
interface, such asMonth
andMonthDay
. The adjuster is responsible for handling special cases, such as the varying lengths of month and leap years.For example this code returns a date on the last day of July:
import static java.time.Month.*; import static java.time.temporal.TemporalAdjusters.*; result = localDateTime.with(JULY).with(lastDayOfMonth());
The classes
LocalDate
andLocalTime
implementTemporalAdjuster
, thus this method can be used to change the date, time or offset:result = localDateTime.with(date); result = localDateTime.with(time);
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 interfaceChronoLocalDateTime<LocalDate>
- Specified by:
with
in interfaceTemporal
- Parameters:
adjuster
- the adjuster to use, not null- Returns:
- a
LocalDateTime
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 date-time with the specified field set to a new value.This returns a
LocalDateTime
, based on this one, with the value for the specified field changed. This can be used to change any supported field, such as the year, month or day-of-month. If it is not possible to set the value, because the field is not supported or for some other reason, an exception is thrown.In some cases, changing the specified field can cause the resulting date-time to become invalid, such as changing the month from 31st January to February would make the day-of-month invalid. In cases like this, the field is responsible for resolving the date. Typically it will choose the previous valid date, which would be the last valid day of February in this example.
If the field is a
ChronoField
then the adjustment is implemented here. Thesupported fields
will behave as per the matching method onLocalDate
orLocalTime
. All otherChronoField
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 interfaceChronoLocalDateTime<LocalDate>
- 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
LocalDateTime
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
-
withYear
Returns a copy of thisLocalDateTime
with the year altered.The time does not affect the calculation and will be the same in the result. If the day-of-month is invalid for the year, it will be changed to the last valid day of the month.
This instance is immutable and unaffected by this method call.
- Parameters:
year
- the year to set in the result, from MIN_YEAR to MAX_YEAR- Returns:
- a
LocalDateTime
based on this date-time with the requested year, not null - Throws:
DateTimeException
- if the year value is invalid
-
withMonth
Returns a copy of thisLocalDateTime
with the month-of-year altered.The time does not affect the calculation and will be the same in the result. If the day-of-month is invalid for the year, it will be changed to the last valid day of the month.
This instance is immutable and unaffected by this method call.
- Parameters:
month
- the month-of-year to set in the result, from 1 (January) to 12 (December)- Returns:
- a
LocalDateTime
based on this date-time with the requested month, not null - Throws:
DateTimeException
- if the month-of-year value is invalid
-
withDayOfMonth
Returns a copy of thisLocalDateTime
with the day-of-month altered.If the resulting date-time is invalid, an exception is thrown. The time does not affect the calculation and will be the same in the result.
This instance is immutable and unaffected by this method call.
- Parameters:
dayOfMonth
- the day-of-month to set in the result, from 1 to 28-31- Returns:
- a
LocalDateTime
based on this date-time with the requested day, not null - Throws:
DateTimeException
- if the day-of-month value is invalid, or if the day-of-month is invalid for the month-year
-
withDayOfYear
Returns a copy of thisLocalDateTime
with the day-of-year altered.If the resulting date-time is invalid, an exception is thrown.
This instance is immutable and unaffected by this method call.
- Parameters:
dayOfYear
- the day-of-year to set in the result, from 1 to 365-366- Returns:
- a
LocalDateTime
based on this date with the requested day, not null - Throws:
DateTimeException
- if the day-of-year value is invalid, or if the day-of-year is invalid for the year
-
withHour
Returns a copy of thisLocalDateTime
with the hour-of-day altered.This instance is immutable and unaffected by this method call.
- Parameters:
hour
- the hour-of-day to set in the result, from 0 to 23- Returns:
- a
LocalDateTime
based on this date-time with the requested hour, not null - Throws:
DateTimeException
- if the hour value is invalid
-
withMinute
Returns a copy of thisLocalDateTime
with the minute-of-hour altered.This instance is immutable and unaffected by this method call.
- Parameters:
minute
- the minute-of-hour to set in the result, from 0 to 59- Returns:
- a
LocalDateTime
based on this date-time with the requested minute, not null - Throws:
DateTimeException
- if the minute value is invalid
-
withSecond
Returns a copy of thisLocalDateTime
with the second-of-minute altered.This instance is immutable and unaffected by this method call.
- Parameters:
second
- the second-of-minute to set in the result, from 0 to 59- Returns:
- a
LocalDateTime
based on this date-time with the requested second, not null - Throws:
DateTimeException
- if the second value is invalid
-
withNano
Returns a copy of thisLocalDateTime
with the nano-of-second altered.This instance is immutable and unaffected by this method call.
- Parameters:
nanoOfSecond
- the nano-of-second to set in the result, from 0 to 999,999,999- Returns:
- a
LocalDateTime
based on this date-time with the requested nanosecond, not null - Throws:
DateTimeException
- if the nano value is invalid
-
truncatedTo
Returns a copy of thisLocalDateTime
with the time truncated.Truncation returns a copy of the original date-time with fields smaller than the specified unit set to zero. For example, truncating with the
minutes
unit will set the second-of-minute and nano-of-second field to zero.The unit must have a duration that divides into the length of a standard day without remainder. This includes all supplied time units on
ChronoUnit
andDAYS
. Other units throw an exception.This instance is immutable and unaffected by this method call.
- Parameters:
unit
- the unit to truncate to, not null- Returns:
- a
LocalDateTime
based on this date-time with the time truncated, not null - Throws:
DateTimeException
- if unable to truncateUnsupportedTemporalTypeException
- if the unit is not supported
-
plus
Returns a copy of this date-time with the specified amount added.This returns a
LocalDateTime
, based on this one, with the specified amount added. The amount is typicallyPeriod
orDuration
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 interfaceChronoLocalDateTime<LocalDate>
- Specified by:
plus
in interfaceTemporal
- Parameters:
amountToAdd
- the amount to add, not null- Returns:
- a
LocalDateTime
based on this date-time with the addition made, not null - Throws:
DateTimeException
- if the addition cannot be madeArithmeticException
- if numeric overflow occurs
-
plus
Returns a copy of this date-time with the specified amount added.This returns a
LocalDateTime
, 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. Date units are added as perLocalDate.plus(long, TemporalUnit)
. Time units are added as perLocalTime.plus(long, TemporalUnit)
with any overflow in days added equivalent to usingplusDays(long)
.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 interfaceChronoLocalDateTime<LocalDate>
- 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
LocalDateTime
based on this date-time 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 thisLocalDateTime
with the specified number of years added.This method adds the specified amount to the years field in three steps:
- Add the input years to the year field
- Check if the resulting date would be invalid
- Adjust the day-of-month to the last valid day if necessary
For example, 2008-02-29 (leap year) plus one year would result in the invalid date 2009-02-29 (standard year). Instead of returning an invalid result, the last valid day of the month, 2009-02-28, is selected instead.
This instance is immutable and unaffected by this method call.
- Parameters:
years
- the years to add, may be negative- Returns:
- a
LocalDateTime
based on this date-time with the years added, not null - Throws:
DateTimeException
- if the result exceeds the supported date range
-
plusMonths
Returns a copy of thisLocalDateTime
with the specified number of months added.This method adds the specified amount to the months field in three steps:
- Add the input months to the month-of-year field
- Check if the resulting date would be invalid
- Adjust the day-of-month to the last valid day if necessary
For example, 2007-03-31 plus one month would result in the invalid date 2007-04-31. Instead of returning an invalid result, the last valid day of the month, 2007-04-30, is selected instead.
This instance is immutable and unaffected by this method call.
- Parameters:
months
- the months to add, may be negative- Returns:
- a
LocalDateTime
based on this date-time with the months added, not null - Throws:
DateTimeException
- if the result exceeds the supported date range
-
plusWeeks
Returns a copy of thisLocalDateTime
with the specified number of weeks added.This method adds the specified amount in weeks to the days field incrementing the month and year fields as necessary to ensure the result remains valid. The result is only invalid if the maximum/minimum year is exceeded.
For example, 2008-12-31 plus one week would result in 2009-01-07.
This instance is immutable and unaffected by this method call.
- Parameters:
weeks
- the weeks to add, may be negative- Returns:
- a
LocalDateTime
based on this date-time with the weeks added, not null - Throws:
DateTimeException
- if the result exceeds the supported date range
-
plusDays
Returns a copy of thisLocalDateTime
with the specified number of days added.This method adds the specified amount to the days field incrementing the month and year fields as necessary to ensure the result remains valid. The result is only invalid if the maximum/minimum year is exceeded.
For example, 2008-12-31 plus one day would result in 2009-01-01.
This instance is immutable and unaffected by this method call.
- Parameters:
days
- the days to add, may be negative- Returns:
- a
LocalDateTime
based on this date-time with the days added, not null - Throws:
DateTimeException
- if the result exceeds the supported date range
-
plusHours
Returns a copy of thisLocalDateTime
with the specified number of hours added.This instance is immutable and unaffected by this method call.
- Parameters:
hours
- the hours to add, may be negative- Returns:
- a
LocalDateTime
based on this date-time with the hours added, not null - Throws:
DateTimeException
- if the result exceeds the supported date range
-
plusMinutes
Returns a copy of thisLocalDateTime
with the specified number of minutes added.This instance is immutable and unaffected by this method call.
- Parameters:
minutes
- the minutes to add, may be negative- Returns:
- a
LocalDateTime
based on this date-time with the minutes added, not null - Throws:
DateTimeException
- if the result exceeds the supported date range
-
plusSeconds
Returns a copy of thisLocalDateTime
with the specified number of seconds added.This instance is immutable and unaffected by this method call.
- Parameters:
seconds
- the seconds to add, may be negative- Returns:
- a
LocalDateTime
based on this date-time with the seconds added, not null - Throws:
DateTimeException
- if the result exceeds the supported date range
-
plusNanos
Returns a copy of thisLocalDateTime
with the specified number of nanoseconds added.This instance is immutable and unaffected by this method call.
- Parameters:
nanos
- the nanos to add, may be negative- Returns:
- a
LocalDateTime
based on this date-time with the nanoseconds added, not null - Throws:
DateTimeException
- if the result exceeds the supported date range
-
minus
Returns a copy of this date-time with the specified amount subtracted.This returns a
LocalDateTime
, based on this one, with the specified amount subtracted. The amount is typicallyPeriod
orDuration
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 interfaceChronoLocalDateTime<LocalDate>
- Specified by:
minus
in interfaceTemporal
- Parameters:
amountToSubtract
- the amount to subtract, not null- Returns:
- a
LocalDateTime
based on this date-time with the subtraction made, not null - Throws:
DateTimeException
- if the subtraction cannot be madeArithmeticException
- if numeric overflow occurs
-
minus
Returns a copy of this date-time with the specified amount subtracted.This returns a
LocalDateTime
, 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 interfaceChronoLocalDateTime<LocalDate>
- 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
LocalDateTime
based on this date-time 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 thisLocalDateTime
with the specified number of years subtracted.This method subtracts the specified amount from the years field in three steps:
- Subtract the input years from the year field
- Check if the resulting date would be invalid
- Adjust the day-of-month to the last valid day if necessary
For example, 2008-02-29 (leap year) minus one year would result in the invalid date 2007-02-29 (standard year). Instead of returning an invalid result, the last valid day of the month, 2007-02-28, is selected instead.
This instance is immutable and unaffected by this method call.
- Parameters:
years
- the years to subtract, may be negative- Returns:
- a
LocalDateTime
based on this date-time with the years subtracted, not null - Throws:
DateTimeException
- if the result exceeds the supported date range
-
minusMonths
Returns a copy of thisLocalDateTime
with the specified number of months subtracted.This method subtracts the specified amount from the months field in three steps:
- Subtract the input months from the month-of-year field
- Check if the resulting date would be invalid
- Adjust the day-of-month to the last valid day if necessary
For example, 2007-03-31 minus one month would result in the invalid date 2007-02-31. Instead of returning an invalid result, the last valid day of the month, 2007-02-28, is selected instead.
This instance is immutable and unaffected by this method call.
- Parameters:
months
- the months to subtract, may be negative- Returns:
- a
LocalDateTime
based on this date-time with the months subtracted, not null - Throws:
DateTimeException
- if the result exceeds the supported date range
-
minusWeeks
Returns a copy of thisLocalDateTime
with the specified number of weeks subtracted.This method subtracts the specified amount in weeks from the days field decrementing the month and year fields as necessary to ensure the result remains valid. The result is only invalid if the maximum/minimum year is exceeded.
For example, 2009-01-07 minus one week would result in 2008-12-31.
This instance is immutable and unaffected by this method call.
- Parameters:
weeks
- the weeks to subtract, may be negative- Returns:
- a
LocalDateTime
based on this date-time with the weeks subtracted, not null - Throws:
DateTimeException
- if the result exceeds the supported date range
-
minusDays
Returns a copy of thisLocalDateTime
with the specified number of days subtracted.This method subtracts the specified amount from the days field decrementing the month and year fields as necessary to ensure the result remains valid. The result is only invalid if the maximum/minimum year is exceeded.
For example, 2009-01-01 minus one day would result in 2008-12-31.
This instance is immutable and unaffected by this method call.
- Parameters:
days
- the days to subtract, may be negative- Returns:
- a
LocalDateTime
based on this date-time with the days subtracted, not null - Throws:
DateTimeException
- if the result exceeds the supported date range
-
minusHours
Returns a copy of thisLocalDateTime
with the specified number of hours subtracted.This instance is immutable and unaffected by this method call.
- Parameters:
hours
- the hours to subtract, may be negative- Returns:
- a
LocalDateTime
based on this date-time with the hours subtracted, not null - Throws:
DateTimeException
- if the result exceeds the supported date range
-
minusMinutes
Returns a copy of thisLocalDateTime
with the specified number of minutes subtracted.This instance is immutable and unaffected by this method call.
- Parameters:
minutes
- the minutes to subtract, may be negative- Returns:
- a
LocalDateTime
based on this date-time with the minutes subtracted, not null - Throws:
DateTimeException
- if the result exceeds the supported date range
-
minusSeconds
Returns a copy of thisLocalDateTime
with the specified number of seconds subtracted.This instance is immutable and unaffected by this method call.
- Parameters:
seconds
- the seconds to subtract, may be negative- Returns:
- a
LocalDateTime
based on this date-time with the seconds subtracted, not null - Throws:
DateTimeException
- if the result exceeds the supported date range
-
minusNanos
Returns a copy of thisLocalDateTime
with the specified number of nanoseconds subtracted.This instance is immutable and unaffected by this method call.
- Parameters:
nanos
- the nanos to subtract, may be negative- Returns:
- a
LocalDateTime
based on this date-time with the nanoseconds subtracted, not null - Throws:
DateTimeException
- if the result exceeds the supported date range
-
query
Queries this date-time using the specified query.This queries this date-time 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 interfaceChronoLocalDateTime<LocalDate>
- 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 the same date and time as this object.This returns a temporal object of the same observable type as the input with the date and time changed to be the same as this.
The adjustment is equivalent to using
Temporal.with(TemporalField, long)
twice, passingChronoField.EPOCH_DAY
andChronoField.NANO_OF_DAY
as the fields.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 = thisLocalDateTime.adjustInto(temporal); temporal = temporal.with(thisLocalDateTime);
This instance is immutable and unaffected by this method call.
- Specified by:
adjustInto
in interfaceChronoLocalDateTime<LocalDate>
- 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 date-time in terms of the specified unit.This calculates the amount of time between two
LocalDateTime
objects in terms of a singleTemporalUnit
. The start and end points arethis
and the specified date-time. The result will be negative if the end is before the start. TheTemporal
passed to this method is converted to aLocalDateTime
usingfrom(TemporalAccessor)
. For example, the amount in days between two date-times can be calculated usingstartDateTime.until(endDateTime, DAYS)
.The calculation returns a whole number, representing the number of complete units between the two date-times. For example, the amount in months between 2012-06-15T00:00 and 2012-08-14T23:59 will only be one month as it is one minute short of two months.
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, MONTHS); amount = MONTHS.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 unitsNANOS
,MICROS
,MILLIS
,SECONDS
,MINUTES
,HOURS
andHALF_DAYS
,DAYS
,WEEKS
,MONTHS
,YEARS
,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 aLocalDateTime
, not nullunit
- the unit to measure the amount in, not null- Returns:
- the amount of time between this date-time and the end date-time
- Throws:
DateTimeException
- if the amount cannot be calculated, or the end temporal cannot be converted to aLocalDateTime
UnsupportedTemporalTypeException
- if the unit is not supportedArithmeticException
- if numeric overflow occurs
-
format
Formats this date-time using the specified formatter.This date-time will be passed to the formatter to produce a string.
- Specified by:
format
in interfaceChronoLocalDateTime<LocalDate>
- Parameters:
formatter
- the formatter to use, not null- Returns:
- the formatted date-time string, not null
- Throws:
DateTimeException
- if an error occurs during printing
-
atOffset
Combines this date-time with an offset to create anOffsetDateTime
.This returns an
OffsetDateTime
formed from this date-time at the specified offset. All possible combinations of date-time and offset are valid.- Parameters:
offset
- the offset to combine with, not null- Returns:
- the offset date-time formed from this date-time and the specified offset, not null
-
atZone
Combines this date-time with a time-zone to create aZonedDateTime
.This returns a
ZonedDateTime
formed from this date-time at the specified time-zone. The result will match this date-time as closely as possible. Time-zone rules, such as daylight savings, mean that not every local date-time is valid for the specified zone, thus the local date-time may be adjusted.The local date-time is resolved to a single instant on the time-line. This is achieved by finding a valid offset from UTC/Greenwich for the local date-time as defined by the
rules
of the zone ID.In most cases, there is only one valid offset for a local date-time. In the case of an overlap, where clocks are set back, there are two valid offsets. This method uses the earlier offset typically corresponding to "summer".
In the case of a gap, where clocks jump forward, there is no valid offset. Instead, the local date-time is adjusted to be later by the length of the gap. For a typical one hour daylight savings change, the local date-time will be moved one hour later into the offset typically corresponding to "summer".
To obtain the later offset during an overlap, call
ZonedDateTime.withLaterOffsetAtOverlap()
on the result of this method. To throw an exception when there is a gap or overlap, useZonedDateTime.ofStrict(LocalDateTime, ZoneOffset, ZoneId)
.- Specified by:
atZone
in interfaceChronoLocalDateTime<LocalDate>
- Parameters:
zone
- the time-zone to use, not null- Returns:
- the zoned date-time formed from this date-time, not null
-
compareTo
Compares this date-time to another date-time.The comparison is primarily based on the date-time, from earliest to latest. It is "consistent with equals", as defined by
Comparable
.If all the date-times being compared are instances of
LocalDateTime
, then the comparison will be entirely based on the date-time. If some dates being compared are in different chronologies, then the chronology is also considered, seeChronoLocalDateTime.compareTo(ChronoLocalDateTime)
.- Specified by:
compareTo
in interfaceChronoLocalDateTime<LocalDate>
- Specified by:
compareTo
in interfaceComparable<ChronoLocalDateTime<?>>
- Parameters:
other
- the other date-time to compare to, not null- Returns:
- the comparator value, that is the comparison of this local date-time with
the
other
local date-time and this chronology with theother
chronology, in order, returning the first non-zero result, and otherwise returning zero - See Also:
-
isAfter
Checks if this date-time is after the specified date-time.This checks to see if this date-time represents a point on the local time-line after the other date-time.
LocalDate a = LocalDateTime.of(2012, 6, 30, 12, 00); LocalDate b = LocalDateTime.of(2012, 7, 1, 12, 00); a.isAfter(b) == false a.isAfter(a) == false b.isAfter(a) == true
This method only considers the position of the two date-times on the local time-line. It does not take into account the chronology, or calendar system. This is different from the comparison in
compareTo(ChronoLocalDateTime)
, but is the same approach asChronoLocalDateTime.timeLineOrder()
.- Specified by:
isAfter
in interfaceChronoLocalDateTime<LocalDate>
- Parameters:
other
- the other date-time to compare to, not null- Returns:
- true if this date-time is after the specified date-time
-
isBefore
Checks if this date-time is before the specified date-time.This checks to see if this date-time represents a point on the local time-line before the other date-time.
LocalDate a = LocalDateTime.of(2012, 6, 30, 12, 00); LocalDate b = LocalDateTime.of(2012, 7, 1, 12, 00); a.isBefore(b) == true a.isBefore(a) == false b.isBefore(a) == false
This method only considers the position of the two date-times on the local time-line. It does not take into account the chronology, or calendar system. This is different from the comparison in
compareTo(ChronoLocalDateTime)
, but is the same approach asChronoLocalDateTime.timeLineOrder()
.- Specified by:
isBefore
in interfaceChronoLocalDateTime<LocalDate>
- Parameters:
other
- the other date-time to compare to, not null- Returns:
- true if this date-time is before the specified date-time
-
isEqual
Checks if this date-time is equal to the specified date-time.This checks to see if this date-time represents the same point on the local time-line as the other date-time.
LocalDate a = LocalDateTime.of(2012, 6, 30, 12, 00); LocalDate b = LocalDateTime.of(2012, 7, 1, 12, 00); a.isEqual(b) == false a.isEqual(a) == true b.isEqual(a) == false
This method only considers the position of the two date-times on the local time-line. It does not take into account the chronology, or calendar system. This is different from the comparison in
compareTo(ChronoLocalDateTime)
, but is the same approach asChronoLocalDateTime.timeLineOrder()
.- Specified by:
isEqual
in interfaceChronoLocalDateTime<LocalDate>
- Parameters:
other
- the other date-time to compare to, not null- Returns:
- true if this date-time is equal to the specified date-time
-
equals
Checks if this date-time is equal to another date-time.Compares this
LocalDateTime
with another ensuring that the date-time is the same. Only objects of typeLocalDateTime
are compared, other types return false.- Specified by:
equals
in interfaceChronoLocalDateTime<LocalDate>
- Overrides:
equals
in classObject
- Parameters:
obj
- the object to check, null returns false- Returns:
- true if this is equal to the other date-time
- See Also:
-
hashCode
public int hashCode()A hash code for this date-time.- Specified by:
hashCode
in interfaceChronoLocalDateTime<LocalDate>
- Overrides:
hashCode
in classObject
- Returns:
- a suitable hash code
- See Also:
-
toString
Outputs this date-time as aString
, such as2007-12-03T10:15:30
.The output will be one of the following ISO-8601 formats:
uuuu-MM-dd'T'HH:mm
uuuu-MM-dd'T'HH:mm:ss
uuuu-MM-dd'T'HH:mm:ss.SSS
uuuu-MM-dd'T'HH:mm:ss.SSSSSS
uuuu-MM-dd'T'HH:mm:ss.SSSSSSSSS
- Specified by:
toString
in interfaceChronoLocalDateTime<LocalDate>
- Overrides:
toString
in classObject
- Returns:
- a string representation of this date-time, not null
-