Class DateFormat.Field

java.lang.Object

java.text.AttributedCharacterIterator.Attribute

java.text.Format.Field

java.text.DateFormat.Field

All Implemented Interfaces:

Serializable

Enclosing class:

DateFormat

public static class DateFormat.Field
extends Format.Field

Defines constants that are used as attribute keys in the AttributedCharacterIterator returned from DateFormat.formatToCharacterIterator and as field identifiers in FieldPosition.

The class also provides two methods to map between its constants and the corresponding Calendar constants.

Since:

1.4

See Also:

• Calendar
• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final DateFormat.Field	AM_PM	Constant identifying the time of day indicator (e.g. "a.m." or "p.m.") field.
static final DateFormat.Field	DAY_OF_MONTH	Constant identifying the day of month field.
static final DateFormat.Field	DAY_OF_WEEK	Constant identifying the day of week field.
static final DateFormat.Field	DAY_OF_WEEK_IN_MONTH	Constant identifying the day of week field.
static final DateFormat.Field	DAY_OF_YEAR	Constant identifying the day of year field.
static final DateFormat.Field	ERA	Constant identifying the era field.
static final DateFormat.Field	HOUR_OF_DAY0	Constant identifying the hour of day field, where the legal values are 0 to 23.
static final DateFormat.Field	HOUR_OF_DAY1	Constant identifying the hour of day field, where the legal values are 1 to 24.
static final DateFormat.Field	HOUR0	Constant identifying the hour field, where the legal values are 0 to 11.
static final DateFormat.Field	HOUR1	Constant identifying the hour field, where the legal values are 1 to 12.
static final DateFormat.Field	MILLISECOND	Constant identifying the millisecond field.
static final DateFormat.Field	MINUTE	Constant identifying the minute field.
static final DateFormat.Field	MONTH	Constant identifying the month field.
static final DateFormat.Field	SECOND	Constant identifying the second field.
static final DateFormat.Field	TIME_ZONE	Constant identifying the time zone field.
static final DateFormat.Field	WEEK_OF_MONTH	Constant identifying the week of month field.
static final DateFormat.Field	WEEK_OF_YEAR	Constant identifying the week of year field.
static final DateFormat.Field	YEAR	Constant identifying the year field.

Fields declared in class AttributedCharacterIterator.Attribute

INPUT_METHOD_SEGMENT, LANGUAGE, READING

Modifier and Type	Field	Description
static final AttributedCharacterIterator.Attribute	INPUT_METHOD_SEGMENT	Attribute key for input method segments.
static final AttributedCharacterIterator.Attribute	LANGUAGE	Attribute key for the language of some text.
static final AttributedCharacterIterator.Attribute	READING	Attribute key for the reading of some text.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Field(String name, int calendarField)	Creates a Field.

Method Summary

Modifier and Type	Method	Description
int	getCalendarField()	Returns the Calendar field associated with this attribute.
static DateFormat.Field	ofCalendarField(int calendarField)	Returns the Field constant that corresponds to the Calendar constant calendarField.
protected Object	readResolve()	Resolves instances being deserialized to the predefined constants.

Methods declared in class AttributedCharacterIterator.Attribute

equals, getName, hashCode, toString

Modifier and Type	Method	Description
final boolean	equals(Object obj)	Compares two objects for equality.
protected String	getName()	Returns the name of the attribute.
final int	hashCode()	Returns a hash code value for the object.
String	toString()	Returns a string representation of the object.

Methods declared in class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Modifier and Type	Method	Description
protected Object	clone()	Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
protected void	finalize()	Deprecated, for removal: This API element is subject to removal in a future version. May cause performance issues, deadlocks and hangs.
final Class<? extends Object>	getClass()	Answers the unique instance of java.lang.Class which represents the class of the receiver.
final void	notify()	Causes one thread which is waiting on the receiver to be made ready to run.
final void	notifyAll()	Causes all threads which are waiting on the receiver to be made ready to run.
final void	wait()	Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
final void	wait(long time)	Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
final void	wait(long time, int frac)	Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

Field Details

ERA

public static final DateFormat.Field ERA

Constant identifying the era field.

YEAR

public static final DateFormat.Field YEAR

Constant identifying the year field.

MONTH

public static final DateFormat.Field MONTH

Constant identifying the month field.

DAY_OF_MONTH

public static final DateFormat.Field DAY_OF_MONTH

Constant identifying the day of month field.

HOUR_OF_DAY1

public static final DateFormat.Field HOUR_OF_DAY1

Constant identifying the hour of day field, where the legal values are 1 to 24.

HOUR_OF_DAY0

public static final DateFormat.Field HOUR_OF_DAY0

Constant identifying the hour of day field, where the legal values are 0 to 23.

MINUTE

public static final DateFormat.Field MINUTE

Constant identifying the minute field.

SECOND

public static final DateFormat.Field SECOND

Constant identifying the second field.

MILLISECOND

public static final DateFormat.Field MILLISECOND

Constant identifying the millisecond field.

DAY_OF_WEEK

public static final DateFormat.Field DAY_OF_WEEK

Constant identifying the day of week field.

DAY_OF_YEAR

public static final DateFormat.Field DAY_OF_YEAR

Constant identifying the day of year field.

DAY_OF_WEEK_IN_MONTH

public static final DateFormat.Field DAY_OF_WEEK_IN_MONTH

Constant identifying the day of week field.

WEEK_OF_YEAR

public static final DateFormat.Field WEEK_OF_YEAR

Constant identifying the week of year field.

WEEK_OF_MONTH

public static final DateFormat.Field WEEK_OF_MONTH

Constant identifying the week of month field.

AM_PM

public static final DateFormat.Field AM_PM

Constant identifying the time of day indicator (e.g. "a.m." or "p.m.") field.

HOUR1

public static final DateFormat.Field HOUR1

Constant identifying the hour field, where the legal values are 1 to 12.

HOUR0

public static final DateFormat.Field HOUR0

Constant identifying the hour field, where the legal values are 0 to 11.

TIME_ZONE

public static final DateFormat.Field TIME_ZONE

Constant identifying the time zone field.

Constructor Details

Field

protected Field(String name,
 int calendarField)

Creates a Field.

Parameters:

name - the name of the Field

calendarField - the Calendar constant this Field corresponds to; any value, even one outside the range of legal Calendar values may be used, but -1 should be used for values that don't correspond to legal Calendar values

Method Details

ofCalendarField

public static DateFormat.Field ofCalendarField(int calendarField)

Returns the Field constant that corresponds to the Calendar constant calendarField. If there is no direct mapping between the Calendar constant and a Field, null is returned.

Parameters:

calendarField - Calendar field constant

Returns:

Field instance representing calendarField.

Throws:

IllegalArgumentException - if calendarField is not the value of a Calendar field constant.

See Also:

• Calendar

getCalendarField

public int getCalendarField()

Returns the Calendar field associated with this attribute. For example, if this represents the hours field of a Calendar, this method would return Calendar.HOUR. The return value of -1 guarantees that this field does not represent any corresponding constant in Calendar.

Implementation Requirements:

The default implementation always returns -1 if it does not represent any corresponding constant in Calendar.

Returns:

Calendar constant for this field

See Also:

• Calendar

readResolve

protected Object readResolve()
                      throws InvalidObjectException

Resolves instances being deserialized to the predefined constants.

Overrides:

readResolve in class AttributedCharacterIterator.Attribute

Returns:

resolved DateFormat.Field constant

Throws:

InvalidObjectException - if the constant could not be resolved.