public abstract class CalendarNameProvider extends LocaleServiceProvider
An abstract class for service providers that provide localized string representations (display names) of Calendar field values.
Calendar types are used to specify calendar systems for which the getDisplayName and getDisplayNames methods provide calendar field value names. See Calendar.getCalendarType() for details.
Calendar Fields
Calendar fields are specified with the constants defined in Calendar. The following are calendar-common fields and their values to be supported for each calendar system.
| Field | Value | Description |
|---|---|---|
Calendar.MONTH |
Calendar.JANUARY to Calendar.UNDECIMBER
| Month numbering is 0-based (e.g., 0 - January, ..., 11 - December). Some calendar systems have 13 months. Month names need to be supported in both the formatting and stand-alone forms if required by the supported locales. If there's no distinction in the two forms, the same names should be returned in both of the forms. |
Calendar.DAY_OF_WEEK |
Calendar.SUNDAY to Calendar.SATURDAY
| Day-of-week numbering is 1-based starting from Sunday (i.e., 1 - Sunday, ..., 7 - Saturday). |
Calendar.AM_PM |
Calendar.AM to Calendar.PM
| 0 - AM, 1 - PM |
The following are calendar-specific fields and their values to be supported.
| Calendar Type | Field | Value | Description |
|---|---|---|---|
"gregory" | Calendar.ERA | 0 |
GregorianCalendar.BC (BCE) |
| 1 |
GregorianCalendar.AD (CE) | ||
"buddhist" | Calendar.ERA | 0 | BC (BCE) |
| 1 | B.E. (Buddhist Era) | ||
"japanese" | Calendar.ERA | 0 | Seireki (Before Meiji) |
| 1 | Meiji | ||
| 2 | Taisho | ||
| 3 | Showa | ||
| 4 | Heisei | ||
Calendar.YEAR | 1 | the first year in each era. It should be returned when a long style (Calendar.LONG_FORMAT or Calendar.LONG_STANDALONE) is specified. See also the Year representation in SimpleDateFormat. | |
"roc" | Calendar.ERA | 0 | Before R.O.C. |
| 1 | R.O.C. | ||
"islamic" | Calendar.ERA | 0 | Before AH |
| 1 | Anno Hijrah (AH) |
Calendar field value names for "gregory" must be consistent with the date-time symbols provided by DateFormatSymbolsProvider.
Time zone names are supported by TimeZoneNameProvider.
CalendarDataProvider, Locale.getUnicodeLocaleType(String)
protected CalendarNameProvider()
Sole constructor. (For invocation by subclass constructors, typically implicit.)
public abstract String getDisplayName(String calendarType,
int field,
int value,
int style,
Locale locale) Returns the string representation (display name) of the calendar field value in the given style and locale. If no string representation is applicable, null is returned.
field is a Calendar field index, such as Calendar.MONTH. The time zone fields, Calendar.ZONE_OFFSET and Calendar.DST_OFFSET, are not supported by this method. null must be returned if any time zone fields are specified.
value is the numeric representation of the field value. For example, if field is Calendar.DAY_OF_WEEK, the valid values are Calendar.SUNDAY to Calendar.SATURDAY (inclusive).
style gives the style of the string representation. It is one of Calendar.SHORT_FORMAT (SHORT), Calendar.SHORT_STANDALONE, Calendar.LONG_FORMAT (LONG), Calendar.LONG_STANDALONE, Calendar.NARROW_FORMAT, or Calendar.NARROW_STANDALONE.
For example, the following call will return "Sunday".
getDisplayName("gregory", Calendar.DAY_OF_WEEK, Calendar.SUNDAY,
Calendar.LONG_STANDALONE, Locale.ENGLISH);
calendarType - the calendar type. (Any calendar type given by locale is ignored.)field - the Calendar field index, such as Calendar.DAY_OF_WEEK
value - the value of the Calendar field, such as Calendar.MONDAY
style - the string representation style: one of Calendar.SHORT_FORMAT (SHORT), Calendar.SHORT_STANDALONE, Calendar.LONG_FORMAT (LONG), Calendar.LONG_STANDALONE, Calendar.NARROW_FORMAT, or Calendar.NARROW_STANDALONE
locale - the desired localefield value, or null if the string representation is not applicable or the given calendar type is unknownIllegalArgumentException - if field or style is invalidNullPointerException - if locale is null
TimeZoneNameProvider, Calendar.get(int), Calendar.getDisplayName(int, int, Locale)
public abstract Map<String,Integer> getDisplayNames(String calendarType,
int field,
int style,
Locale locale) Returns a Map containing all string representations (display names) of the Calendar field in the given style and locale and their corresponding field values.
field is a Calendar field index, such as Calendar.MONTH. The time zone fields, Calendar.ZONE_OFFSET and Calendar.DST_OFFSET, are not supported by this method. null must be returned if any time zone fields are specified.
style gives the style of the string representation. It must be one of Calendar.ALL_STYLES, Calendar.SHORT_FORMAT (SHORT), Calendar.SHORT_STANDALONE, Calendar.LONG_FORMAT (LONG), Calendar.LONG_STANDALONE, Calendar.NARROW_FORMAT, or Calendar.NARROW_STANDALONE. Note that narrow names may not be unique due to use of single characters, such as "S" for Sunday and Saturday, and that no narrow names are included in that case.
For example, the following call will return a Map containing "January" to Calendar.JANUARY, "Jan" to Calendar.JANUARY, "February" to Calendar.FEBRUARY, "Feb" to Calendar.FEBRUARY, and so on.
getDisplayNames("gregory", Calendar.MONTH, Calendar.ALL_STYLES, Locale.ENGLISH);
calendarType - the calendar type. (Any calendar type given by locale is ignored.)field - the calendar field for which the display names are returnedstyle - the style applied to the display names; one of Calendar.ALL_STYLES, Calendar.SHORT_FORMAT (SHORT), Calendar.SHORT_STANDALONE, Calendar.LONG_FORMAT (LONG), Calendar.LONG_STANDALONE, Calendar.NARROW_FORMAT, or Calendar.NARROW_STANDALONE
locale - the desired localeMap containing all display names of field in style and locale and their field values, or null if no display names are defined for field
NullPointerException - if locale is null
Calendar.getDisplayNames(int, int, Locale)
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