java.io.Serializable
, java.lang.Comparable<Quarter>
, java.time.temporal.TemporalAccessor
, java.time.temporal.TemporalAdjuster
public enum Quarter extends java.lang.Enum<Quarter> implements java.time.temporal.TemporalAccessor, java.time.temporal.TemporalAdjuster
Quarter
is an enum representing the 4 quarters of the year -
Q1, Q2, Q3 and Q4. These are defined as January to March, April to June,
July to September and October to December.
The int
value follows the quarter, from 1 (Q1) to 4 (Q4).
It is recommended that applications use the enum rather than the int
value
to ensure code clarity.
Do not use ordinal()
to obtain the numeric representation of Quarter
.
Use getValue()
instead.
This enum represents a common concept that is found in many calendar systems. As such, this enum may be used by any calendar system that has the quarter-of-year concept defined exactly equivalent to the ISO calendar system.
Enum Constant | Description |
---|---|
Q1 |
The singleton instance for the first quarter-of-year, from January to March.
|
Q2 |
The singleton instance for the second quarter-of-year, from April to June.
|
Q3 |
The singleton instance for the third quarter-of-year, from July to September.
|
Q4 |
The singleton instance for the fourth quarter-of-year, from October to December.
|
Modifier and Type | Method | Description |
---|---|---|
java.time.temporal.Temporal |
adjustInto(java.time.temporal.Temporal temporal) |
Adjusts the specified temporal object to have this quarter-of-year.
|
java.time.Month |
firstMonth() |
Gets the first of the three months that this quarter refers to.
|
static Quarter |
from(java.time.temporal.TemporalAccessor temporal) |
Obtains an instance of
Quarter from a temporal object. |
int |
get(java.time.temporal.TemporalField field) |
Gets the value of the specified field from this quarter-of-year as an
int . |
java.lang.String |
getDisplayName(java.time.format.TextStyle style,
java.util.Locale locale) |
Gets the textual representation, such as 'Q1' or '4th quarter'.
|
long |
getLong(java.time.temporal.TemporalField field) |
Gets the value of the specified field from this quarter-of-year as a
long . |
int |
getValue() |
Gets the quarter-of-year
int value. |
boolean |
isSupported(java.time.temporal.TemporalField field) |
Checks if the specified field is supported.
|
int |
length(boolean leapYear) |
Gets the length of this quarter in days.
|
Quarter |
minus(long quarters) |
Returns the quarter that is the specified number of quarters before this one.
|
static Quarter |
of(int quarterOfYear) |
Obtains an instance of
Quarter from an int value. |
static Quarter |
ofMonth(int monthOfYear) |
Obtains an instance of
Quarter from a month-of-year. |
Quarter |
plus(long quarters) |
Returns the quarter that is the specified number of quarters after this one.
|
<R> R |
query(java.time.temporal.TemporalQuery<R> query) |
Queries this quarter-of-year using the specified query.
|
java.time.temporal.ValueRange |
range(java.time.temporal.TemporalField field) |
Gets the range of valid values for the specified field.
|
static Quarter |
valueOf(java.lang.String name) |
Returns the enum constant of this type with the specified name.
|
static Quarter[] |
values() |
Returns an array containing the constants of this enum type, in
the order they are declared.
|
public static final Quarter Q1
1
.public static final Quarter Q2
2
.public static final Quarter Q3
3
.public static final Quarter Q4
4
.public static Quarter[] values()
for (Quarter c : Quarter.values()) System.out.println(c);
public static Quarter valueOf(java.lang.String name)
name
- the name of the enum constant to be returned.java.lang.IllegalArgumentException
- if this enum type has no constant with the specified namejava.lang.NullPointerException
- if the argument is nullpublic static Quarter of(int quarterOfYear)
Quarter
from an int
value.
Quarter
is an enum representing the 4 quarters of the year.
This factory allows the enum to be obtained from the int
value.
The int
value follows the quarter, from 1 (Q1) to 4 (Q4).
quarterOfYear
- the quarter-of-year to represent, from 1 (Q1) to 4 (Q4)java.time.DateTimeException
- if the quarter-of-year is invalidpublic static Quarter ofMonth(int monthOfYear)
Quarter
from a month-of-year.
Quarter
is an enum representing the 4 quarters of the year.
This factory allows the enum to be obtained from the Month
value.
January to March are Q1, April to June are Q2, July to September are Q3 and October to December are Q4.
monthOfYear
- the month-of-year to convert from, from 1 to 12java.time.DateTimeException
- if the month-of-year is invalidpublic static Quarter from(java.time.temporal.TemporalAccessor temporal)
Quarter
from a temporal object.
This obtains a quarter based on the specified temporal.
A TemporalAccessor
represents an arbitrary set of date and time information,
which this factory converts to an instance of Quarter
.
The conversion extracts the QUARTER_OF_YEAR
field.
The extraction is only permitted if the temporal object has an ISO
chronology, or can be converted to a LocalDate
.
This method matches the signature of the functional interface TemporalQuery
allowing it to be used in queries via method reference, Quarter::from
.
temporal
- the temporal-time object to convert, not nulljava.time.DateTimeException
- if unable to convert to a Quarter
public int getValue()
int
value.
The values are numbered following the ISO-8601 standard, from 1 (Q1) to 4 (Q4).
public java.lang.String getDisplayName(java.time.format.TextStyle style, java.util.Locale locale)
This returns the textual name used to identify the quarter-of-year, suitable for presentation to the user. The parameters control the style of the returned text and the locale.
If no textual mapping is found then the numeric value
is returned.
style
- the length of the text required, not nulllocale
- the locale to use, not nullpublic boolean isSupported(java.time.temporal.TemporalField field)
This checks if this quarter-of-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 QUARTER_OF_YEAR
then
this method returns true.
All 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.
isSupported
in interface java.time.temporal.TemporalAccessor
field
- the field to check, null returns falsepublic java.time.temporal.ValueRange range(java.time.temporal.TemporalField field)
The range object expresses the minimum and maximum valid values for a field. This quarter 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 QUARTER_OF_YEAR
then the
range of the quarter-of-year, from 1 to 4, will be returned.
All ChronoField
instances will throw an UnsupportedTemporalTypeException
.
If the field is not a ChronoField
, then the result of this method
is obtained by invoking TemporalField.rangeRefinedBy(TemporalAccessor)
passing this
as the argument.
Whether the range can be obtained is determined by the field.
range
in interface java.time.temporal.TemporalAccessor
field
- the field to query the range for, not nulljava.time.DateTimeException
- if the range for the field cannot be obtainedjava.time.temporal.UnsupportedTemporalTypeException
- if the field is not supportedpublic int get(java.time.temporal.TemporalField field)
int
.
This queries this quarter 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 QUARTER_OF_YEAR
then the
value of the quarter-of-year, from 1 to 4, will be returned.
All ChronoField
instances will throw an UnsupportedTemporalTypeException
.
If the field is not a ChronoField
, then the result of this method
is obtained by invoking TemporalField.getFrom(TemporalAccessor)
passing this
as the argument. Whether the value can be obtained,
and what the value represents, is determined by the field.
get
in interface java.time.temporal.TemporalAccessor
field
- the field to get, not nulljava.time.DateTimeException
- if a value for the field cannot be obtained or
the value is outside the range of valid values for the fieldjava.time.temporal.UnsupportedTemporalTypeException
- if the field is not supported or
the range of values exceeds an int
java.lang.ArithmeticException
- if numeric overflow occurspublic long getLong(java.time.temporal.TemporalField field)
long
.
This queries this quarter 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 QUARTER_OF_YEAR
then the
value of the quarter-of-year, from 1 to 4, will be returned.
All other ChronoField
instances will throw an UnsupportedTemporalTypeException
.
If the field is not a ChronoField
, then the result of this method
is obtained by invoking TemporalField.getFrom(TemporalAccessor)
passing this
as the argument. Whether the value can be obtained,
and what the value represents, is determined by the field.
getLong
in interface java.time.temporal.TemporalAccessor
field
- the field to get, not nulljava.time.DateTimeException
- if a value for the field cannot be obtainedjava.time.temporal.UnsupportedTemporalTypeException
- if the field is not supportedjava.lang.ArithmeticException
- if numeric overflow occurspublic Quarter plus(long quarters)
The calculation rolls around the end of the year from Q4 to Q1. The specified period may be negative.
This instance is immutable and unaffected by this method call.
quarters
- the quarters to add, positive or negativepublic Quarter minus(long quarters)
The calculation rolls around the start of the year from Q1 to Q4. The specified period may be negative.
This instance is immutable and unaffected by this method call.
quarters
- the quarters to subtract, positive or negativepublic int length(boolean leapYear)
This takes a flag to determine whether to return the length for a leap year or not.
Q1 has 90 in a standard year and 91 days in a leap year. Q2 has 91 days. Q3 and Q4 have 92 days.
leapYear
- true if the length is required for a leap yearpublic java.time.Month firstMonth()
Q1 will return January.
Q2 will return April.
Q3 will return July.
Q4 will return October.
To obtain the other two months of the quarter, simply use Month.plus(long)
on the returned month.
public <R> R query(java.time.temporal.TemporalQuery<R> query)
This queries this quarter-of-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.
query
in interface java.time.temporal.TemporalAccessor
R
- the type of the resultquery
- the query to invoke, not nulljava.time.DateTimeException
- if unable to query (defined by the query)java.lang.ArithmeticException
- if numeric overflow occurs (defined by the query)public java.time.temporal.Temporal adjustInto(java.time.temporal.Temporal temporal)
This returns a temporal object of the same observable type as the input with the quarter-of-year changed to be the same as this.
The adjustment is equivalent to using Temporal.with(TemporalField, long)
passing IsoFields.QUARTER_OF_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 = thisQuarter.adjustInto(temporal); temporal = temporal.with(thisQuarter);
For example, given a date in May, the following are output:
dateInMay.with(Q1); // three months earlier dateInMay.with(Q2); // no change dateInMay.with(Q3); // three months later dateInMay.with(Q4); // six months later
This instance is immutable and unaffected by this method call.
adjustInto
in interface java.time.temporal.TemporalAdjuster
temporal
- the target object to be adjusted, not nulljava.time.DateTimeException
- if unable to make the adjustmentjava.lang.ArithmeticException
- if numeric overflow occursCopyright © 2010–2018 ThreeTen.org. All rights reserved.