Serializable
, Cloneable
public class DateFormatSymbols extends Object implements Serializable, Cloneable
DateFormatSymbols
is a public class for encapsulating localizable date-time formatting data, such as the names of the months, the names of the days of the week, and the time zone data. SimpleDateFormat
uses DateFormatSymbols
to encapsulate this information. Typically you shouldn't use DateFormatSymbols
directly. Rather, you are encouraged to create a date-time formatter with the DateFormat
class's factory methods: getTimeInstance
, getDateInstance
, or getDateTimeInstance
. These methods automatically create a DateFormatSymbols
for the formatter so that you don't have to. After the formatter is created, you may modify its format pattern using the setPattern
method. For more information about creating formatters using DateFormat
's factory methods, see DateFormat
.
If you decide to create a date-time formatter with a specific format pattern for a specific locale, you can do so with:
new SimpleDateFormat(aPattern, DateFormatSymbols.getInstance(aLocale));
If the locale contains "rg" (region override) Unicode extension, the symbols are overridden for the designated region.
DateFormatSymbols
objects are cloneable. When you obtain a DateFormatSymbols
object, feel free to modify the date-time formatting data. For instance, you can replace the localized date-time format pattern characters with the ones that you feel easy to remember. Or you can change the representative cities to your favorite ones.
New DateFormatSymbols
subclasses may be added to support SimpleDateFormat
for date-time formatting for additional locales.
Constructor | Description |
---|---|
DateFormatSymbols() |
Construct a DateFormatSymbols object by loading format data from resources for the default FORMAT locale. |
DateFormatSymbols |
Construct a DateFormatSymbols object by loading format data from resources for the given locale. |
Modifier and Type | Method | Description |
---|---|---|
Object |
clone() |
Overrides Cloneable |
boolean |
equals |
Override equals |
String[] |
getAmPmStrings() |
Gets ampm strings. |
static Locale[] |
getAvailableLocales() |
Returns an array of all locales for which the getInstance methods of this class can return localized instances. |
String[] |
getEras() |
Gets era strings. |
static final DateFormatSymbols |
getInstance() |
Gets the DateFormatSymbols instance for the default locale. |
static final DateFormatSymbols |
getInstance |
Gets the DateFormatSymbols instance for the specified locale. |
String |
getLocalPatternChars() |
Gets localized date-time pattern characters. |
String[] |
getMonths() |
Gets month strings. |
String[] |
getShortMonths() |
Gets short month strings. |
String[] |
getShortWeekdays() |
Gets short weekday strings. |
String[] |
getWeekdays() |
Gets weekday strings. |
String[][] |
getZoneStrings() |
Gets time zone strings. |
int |
hashCode() |
Override hashCode. |
void |
setAmPmStrings |
Sets ampm strings. |
void |
setEras |
Sets era strings. |
void |
setLocalPatternChars |
Sets localized date-time pattern characters. |
void |
setMonths |
Sets month strings. |
void |
setShortMonths |
Sets short month strings. |
void |
setShortWeekdays |
Sets short weekday strings. |
void |
setWeekdays |
Sets weekday strings. |
void |
setZoneStrings |
Sets time zone strings. |
public DateFormatSymbols()
FORMAT
locale. This constructor can only construct instances for the locales supported by the Java runtime environment, not for those supported by installed DateFormatSymbolsProvider
implementations. For full locale coverage, use the getInstance
method. This is equivalent to calling DateFormatSymbols(Locale.getDefault(Locale.Category.FORMAT))
.
MissingResourceException
- if the resources for the default locale cannot be found or cannot be loaded.public DateFormatSymbols(Locale locale)
DateFormatSymbolsProvider
implementations. For full locale coverage, use the getInstance
method.locale
- the desired localeMissingResourceException
- if the resources for the specified locale cannot be found or cannot be loaded.public static Locale[] getAvailableLocales()
getInstance
methods of this class can return localized instances. The returned array represents the union of locales supported by the Java runtime and by installed DateFormatSymbolsProvider
implementations. At a minimum, the returned array must contain a Locale
instance equal to Locale.ROOT
and a Locale
instance equal to Locale.US
.DateFormatSymbols
instances are available.public static final DateFormatSymbols getInstance()
DateFormatSymbols
instance for the default locale. This method provides access to DateFormatSymbols
instances for locales supported by the Java runtime itself as well as for those supported by installed DateFormatSymbolsProvider
implementations. This is equivalent to calling getInstance(Locale.getDefault(Locale.Category.FORMAT))
.
DateFormatSymbols
instance.public static final DateFormatSymbols getInstance(Locale locale)
DateFormatSymbols
instance for the specified locale. This method provides access to DateFormatSymbols
instances for locales supported by the Java runtime itself as well as for those supported by installed DateFormatSymbolsProvider
implementations.locale
- the given locale.DateFormatSymbols
instance.NullPointerException
- if locale
is nullpublic String[] getEras()
public void setEras(String[] newEras)
newEras
- the new era strings.public String[] getMonths()
Calendar.UNDECIMBER
is supported. Use Calendar.JANUARY
, Calendar.FEBRUARY
, etc. to index the result array. If the language requires different forms for formatting and stand-alone usages, this method returns month names in the formatting form. For example, the preferred month name for January in the Czech language is ledna in the formatting form, while it is leden in the stand-alone form. This method returns "ledna"
in this case. Refer to the Calendar Elements in the Unicode Locale Data Markup Language (LDML) specification for more details.
Calendar.UNDECIMBER
is supported.public void setMonths(String[] newMonths)
newMonths
- the new month strings. The array should be indexed by Calendar.JANUARY
, Calendar.FEBRUARY
, etc.public String[] getShortMonths()
Calendar.UNDECIMBER
is supported. Use Calendar.JANUARY
, Calendar.FEBRUARY
, etc. to index the result array. If the language requires different forms for formatting and stand-alone usages, this method returns short month names in the formatting form. For example, the preferred abbreviation for January in the Catalan language is de gen. in the formatting form, while it is gen. in the stand-alone form. This method returns "de gen."
in this case. Refer to the Calendar Elements in the Unicode Locale Data Markup Language (LDML) specification for more details.
Calendar.UNDECIMBER
is supported.public void setShortMonths(String[] newShortMonths)
newShortMonths
- the new short month strings. The array should be indexed by Calendar.JANUARY
, Calendar.FEBRUARY
, etc.public String[] getWeekdays()
Calendar.SUNDAY
, Calendar.MONDAY
, etc. to index the result array.public void setWeekdays(String[] newWeekdays)
newWeekdays
- the new weekday strings. The array should be indexed by Calendar.SUNDAY
, Calendar.MONDAY
, etc.public String[] getShortWeekdays()
Calendar.SUNDAY
, Calendar.MONDAY
, etc. to index the result array.public void setShortWeekdays(String[] newShortWeekdays)
newShortWeekdays
- the new short weekday strings. The array should be indexed by Calendar.SUNDAY
, Calendar.MONDAY
, etc.public String[] getAmPmStrings()
public void setAmPmStrings(String[] newAmpms)
newAmpms
- the new ampm strings.public String[][] getZoneStrings()
TimeZone.getDisplayName()
instead. The value returned is a two-dimensional array of strings of size n by m, where m is at least 5. Each of the n rows is an entry containing the localized names for a single TimeZone
. Each such row contains (with i
ranging from 0..n-1):
zoneStrings[i][0]
- time zone IDzoneStrings[i][1]
- long name of zone in standard timezoneStrings[i][2]
- short name of zone in standard timezoneStrings[i][3]
- long name of zone in daylight saving timezoneStrings[i][4]
- short name of zone in daylight saving timeTimeZone
class that are not custom IDs. All other entries are localized names. If a zone does not implement daylight saving time, the daylight saving time names should not be used. If setZoneStrings
has been called on this DateFormatSymbols
instance, then the strings provided by that call are returned. Otherwise, the returned array contains names provided by the Java runtime and by installed TimeZoneNameProvider
implementations.
public void setZoneStrings(String[][] newZoneStrings)
TimeZone
. Each such row contains (with i
ranging from 0..n-1): zoneStrings[i][0]
- time zone IDzoneStrings[i][1]
- long name of zone in standard timezoneStrings[i][2]
- short name of zone in standard timezoneStrings[i][3]
- long name of zone in daylight saving timezoneStrings[i][4]
- short name of zone in daylight saving timeTimeZone
class that are not custom IDs. All other entries are localized names.newZoneStrings
- the new time zone strings.IllegalArgumentException
- if the length of any row in newZoneStrings
is less than 5NullPointerException
- if newZoneStrings
is nullpublic String getLocalPatternChars()
public void setLocalPatternChars(String newLocalPatternChars)
newLocalPatternChars
- the new localized date-time pattern characters.public Object clone()
public int hashCode()
public boolean equals(Object obj)
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https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/text/DateFormatSymbols.html