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DateFormat.Field (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档

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java.text
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

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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

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

 

Fields inherited from class java.text.AttributedCharacterIterator.Attribute
INPUT_METHOD_SEGMENT, LANGUAGE, READING

 

Constructor Summary
protected	DateFormat.Field(String name, int calendarField)           Creates a Field.

 

Method Summary
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 inherited from class java.text.AttributedCharacterIterator.Attribute
equals, getName, hashCode, toString

 

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

 

Field Detail

ERA

public static final DateFormat.Field ERA

Constant identifying the era field.

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YEAR

public static final DateFormat.Field YEAR

Constant identifying the year field.

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MONTH

public static final DateFormat.Field MONTH

Constant identifying the month field.

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DAY_OF_MONTH

public static final DateFormat.Field DAY_OF_MONTH

Constant identifying the day of month field.

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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.

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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.

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MINUTE

public static final DateFormat.Field MINUTE

Constant identifying the minute field.

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SECOND

public static final DateFormat.Field SECOND

Constant identifying the second field.

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MILLISECOND

public static final DateFormat.Field MILLISECOND

Constant identifying the millisecond field.

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DAY_OF_WEEK

public static final DateFormat.Field DAY_OF_WEEK

Constant identifying the day of week field.

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DAY_OF_YEAR

public static final DateFormat.Field DAY_OF_YEAR

Constant identifying the day of year field.

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DAY_OF_WEEK_IN_MONTH

public static final DateFormat.Field DAY_OF_WEEK_IN_MONTH

Constant identifying the day of week field.

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WEEK_OF_YEAR

public static final DateFormat.Field WEEK_OF_YEAR

Constant identifying the week of year field.

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WEEK_OF_MONTH

public static final DateFormat.Field WEEK_OF_MONTH

Constant identifying the week of month field.

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AM_PM

public static final DateFormat.Field AM_PM

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

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HOUR1

public static final DateFormat.Field HOUR1

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

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HOUR0

public static final DateFormat.Field HOUR0

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

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TIME_ZONE

public static final DateFormat.Field TIME_ZONE

Constant identifying the time zone field.

Constructor Detail

DateFormat.Field

protected DateFormat.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 Detail

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

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getCalendarField

public int getCalendarField()

Returns the Calendar field associated with this attribute. For example, if this represents the hours field of a Calendar, this would return Calendar.HOUR. If there is no corresponding Calendar constant, this will return -1.

Returns:

Calendar constant for this field

See Also:

Calendar

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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.

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