Couldn't Translate Date To Spanish With Locale("es_ES")


Answer :

"es_ES" is a language + country. You must specify each part separately.



The constructors for Locale are:




  • Locale(String language)
    Construct a locale from a language code.

  • Locale(String language, String country)
    Construct a locale from language, country.

  • Locale(String language, String country, String variant)
    Construct a locale from language, country, variant.



You want new Locale("es", "ES"); to get the Locale that goes with es_ES.



However, it would be better to use Locale.forLanguageTag("es-ES"), using the well-formed IETF BCP 47 language tag es-ES (with - instead of _), since that method can return a cached Locale, instead of always creating a new one.



tl;dr



String output = 
ZonedDateTime.now ( ZoneId.of ( "Europe/Madrid" ) )
.format (
DateTimeFormatter.ofLocalizedDate ( FormatStyle.FULL )
.withLocale ( new Locale ( "es" , "ES" ) )
)
;



martes 12 de julio de 2016




Details



The accepted Answer by Affe is correct. You were incorrectly constructing a Locale object.



java.time



The Question and Answer both use old outmoded classes now supplanted by the java.time framework built into Java 8 and later. These classes supplant the old troublesome date-time classes such as java.util.Date. See Oracle Tutorial. Much of the java.time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport and further adapted to Android in ThreeTenABP.



These classes include the DateTimeFormatter to control the format of text when generating a String from your date-time value. You can specify an explicit formatting pattern. But why bother? Let the class automatically localize the format to the human language and cultural norms of a specific Locale.



For example, get the current moment in Madrid regional time zone.



ZoneId zoneId = ZoneId.of( "Europe/Madrid" );
ZonedDateTime zdt = ZonedDateTime.now( zoneId );
// example: 2016-07-12T01:43:09.231+02:00[Europe/Madrid]


Instantiate a formatter to generate a String to represent that date-time value. Specify the length of the text via FormatStyle (full, long, medium, short).



DateTimeFormatter formatter = DateTimeFormatter.ofLocalizedDate ( FormatStyle.FULL );


Apply a Locale to substitute for the JVM’s current default Locale assigned to the formatter.



Locale locale = new Locale ( "es" , "ES" );
formatter = formatter.withLocale ( locale );


Use the formatter to generate a String object.



String output = zdt.format ( formatter );
// example: martes 12 de julio de 2016


Dump to console.



System.out.println ( "zdt: " + zdt + " with locale: " + locale + " | output: " + output );



zdt: 2016-07-12T01:43:09.231+02:00[Europe/Madrid] with locale: es_ES | output: martes 12 de julio de 2016




Java 8



LocalDate today = LocalDate.now();
String day = today.getDayOfWeek().getDisplayName(TextStyle.FULL, new Locale("es","ES")));


Also works for month.



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