SimpleDateFormat and locale based format string

Question

I m trying to format a date in Java in different ways based on the given locale  For instance I want English users to see  Nov 1  2009   formatted by  MMM d  yyyy   and Norwegian users to see  1  nov  2009    d  MMM  yyyy     The month part works OK if I add the locale to the SimpleDateFormat constructor  but what about the rest   I was hoping I could add format strings paired with locales to SimpleDateFormat  but I can t find any way to do this  Is it possible or do I need to let my code check the locale and add the corresponding format string

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Use the style   locale  DateFormat getDateInstance int style  Locale locale    Check  http   java sun com j2se 1 5 0 docs api java text DateFormat html  Run the following example to see the differences   import java text DateFormat  import java util Date  import java util Locale   public class DateFormatDemoSO     public static void main String args          int style   DateFormat MEDIUM        Also try with style   DateFormat FULL and DateFormat SHORT     Date date   new Date        DateFormat df      df   DateFormat getDateInstance style  Locale UK       System out println  United Kingdom      df format date        df   DateFormat getDateInstance style  Locale US       System out println  USA      df format date           df   DateFormat getDateInstance style  Locale FRANCE       System out println  France      df format date        df   DateFormat getDateInstance style  Locale ITALY       System out println  Italy      df format date        df   DateFormat getDateInstance style  Locale JAPAN       System out println  Japan      df format date            Output   United Kingdom  25-Sep-2017 USA  Sep 25  2017 France  25 sept  2017 Italy  25-set-2017 Japan  2017 09 25

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Hope this helps someone  Please find in the below code which accepts Locale instance and returns the locale specific date format pattern  public static String getLocaleDatePattern Locale locale           Validating if Locale instance is null     if  locale    null    locale getLanguage      null            return  quot MM dd yyyy quot                Fetching the locale specific date pattern     String localeDatePattern     SimpleDateFormat  DateFormat getDateInstance              DateFormat SHORT  locale   toPattern           Validating if locale type is having language code for Chinese and country        code for  Hong Kong  with Date Format as - yy   M   d        if  locale toString   equalsIgnoreCase  quot zh hk quot                 Expected application Date Format for Chinese  Hong Kong  locale type         return  quot yyyy MM dd quot                Replacing all d m y OR Gy with dd MM yyyy as per the locale date pattern     localeDatePattern   localeDatePattern replaceAll  quot d 1 2  quot    quot dd quot                replaceAll  quot M 1 2  quot    quot MM quot                replaceAll  quot y 1 4  Gy quot    quot yyyy quot           Replacing all blank spaces in the locale date pattern     localeDatePattern   localeDatePattern replace  quot   quot    quot  quot           Validating the date pattern length to remove any extract characters     if  localeDatePattern length    gt  10               Keeping the standard length as expected by the application         localeDatePattern   localeDatePattern substring 0  10             return localeDatePattern

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Use DateFormat getDateInstance int style  Locale locale  instead of creating your own patterns with SimpleDateFormat

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Java 8 Style for a given date  LocalDate today   LocalDate of 1982  Month AUGUST  31   System out println today format DateTimeFormatter ofLocalizedDate FormatStyle MEDIUM  withLocale Locale ENGLISH     System out println today format DateTimeFormatter ofLocalizedDate FormatStyle MEDIUM  withLocale Locale FRENCH     System out println today format DateTimeFormatter ofLocalizedDate FormatStyle MEDIUM  withLocale Locale JAPANESE

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Java8  import java time format DateTimeFormatter            myDate format DateTimeFormatter ofPattern  quot dd-MMM-YYYY quot  new Locale  quot ar quot

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String text   new SimpleDateFormat  E  MMM d  yyyy   format date

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SimpleDateFormat dateFormat   new SimpleDateFormat  EEEE dd MMM yyyy   Locale ENGLISH   String formatted   dateFormat format the date you want here

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This will display the date according to user s current locale   To return date and time   import java text DateFormat      import java util Date   Date date   new Date    DateFormat df   DateFormat getDateTimeInstance    String myDate   df format date     Dec 31  1969 7 00 02 PM    To return date only  use   DateFormat getDateInstance      Dec 31  1969

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tl dr  LocalDate now   format      DateTimeFormatter ofLocalizedDate  FormatStyle MEDIUM                         withLocale  new Locale   no     NO          The troublesome classes of java util Date and SimpleDateFormat are now legacy  supplanted by the java time classes   LocalDate  The LocalDate class represents a date-only value without time-of-day and without time zone   A time zone is crucial in determining a date  For any given moment  the date varies around the globe by zone  For example  a few minutes after midnight in Paris France is a new day while still    yesterday    in Montr  al Qu  bec   ZoneId z   ZoneId of   America Montreal     LocalDate today   LocalDate now  z      DateTimeFormatter  Use DateTimeFormatter to generate strings representing only the date-portion or the time-portion   The DateTimeFormatter class can automatically localize   To localize  specify    FormatStyle to determine how long or abbreviated should the string be  Locale to determine  a  the human language for translation of name of day  name of month  and such  and  b  the cultural norms deciding issues of abbreviation  capitalization  punctuation  and such    Example   Locale l   Locale CANADA FRENCH    DateTimeFormatter f   DateTimeFormatter ofLocalizedDate  FormatStyle FULL   withLocale  l    String output   ld format  f      Going the other direction  you can parse a localized string   LocalDate ld   LocalDate parse  input   f      Note that the locale and time zone are completely orthogonal issues  You can have a Montr  al moment presented in Japanese language or an Auckland New Zealand moment presented in Hindi language    Another example  Change 6 junio 2012  Spanish  to 2012-06-06  standard ISO 8601 format   The java time classes use ISO 8601 formats by default for parsing generating strings   String input    6 junio 2012   Locale l   new Locale    es     ES     DateTimeFormatter f   DateTimeFormatter ofPattern    d MMMM uuuu    l    LocalDate ld   LocalDate parse   input   f    String output   ld toString        2012-06-06     Peruse formats  Here is some example code for perusing the results of multiple formats in multiple locales  automatically localized   An EnumSet is an implementation of Set  highly optimized for both low memory usage and fast execution speed when collecting Enum objects  So  EnumSet allOf  FormatStyle class   gives us a collection of all four of the FormatStyle enum objects to loop  For more info  see Oracle Tutorial on enum types   LocalDate ld   LocalDate of  2018   Month JANUARY   23     List  lt  Locale  gt  locales   new ArrayList  lt  gt   3    locales add  Locale CANADA FRENCH    locales add  new Locale   no     NO       locales add  Locale US        Or use all locales  almost 800 of them  for about 120K text results      Locale   locales   Locale getAvailableLocales       All known locales  Almost 800 of them   for   Locale locale   locales         System out println   ------   LOCALE      locale             locale getDisplayName         ----------------------------------    System lineSeparator           for   FormatStyle style   EnumSet allOf  FormatStyle class                   DateTimeFormatter f   DateTimeFormatter ofLocalizedDate  style   withLocale  locale            String output   ld format  f            System out println  output              System out println          System out println      fin       System lineSeparator        Output   ------   LOCALE  fr CA     French  Canada    ----------------------------------  mardi 23 janvier 2018 23 janvier 2018 23 janv  2018 18-01-23  ------   LOCALE  no NO     Norwegian  Norway    ----------------------------------  tirsdag 23  januar 2018 23  januar 2018 23  jan  2018 23 01 2018  ------   LOCALE  en US     English  United States    ----------------------------------  Tuesday  January 23  2018 January 23  2018 Jan 23  2018 1 23 18     fin        About java time  The java time framework is built into Java 8 and later  These classes supplant the troublesome old legacy date-time classes such as java util Date  Calendar   amp  SimpleDateFormat   The Joda-Time project  now in maintenance mode  advises migration to the java time classes   To learn more  see the Oracle Tutorial  And search Stack Overflow for many examples and explanations  Specification is JSR 310   You may exchange java time objects directly with your database  Use a JDBC driver compliant with JDBC 4 2 or later  No need for strings  no need for java sql   classes   Where to obtain the java time classes     Java SE 8  Java SE 9  and later   Built-in   Part of the standard Java API with a bundled implementation  Java 9 adds some minor features and fixes   Java SE 6 and Java SE 7   Much of the java time functionality is back-ported to Java 6  amp  7 in ThreeTen-Backport   Android   Later versions of Android bundle implementations of the java time classes  For earlier Android  the ThreeTenABP project adapts ThreeTen-Backport  mentioned above   See How to use ThreeTenABP        The ThreeTen-Extra project extends java time with additional classes  This project is a proving ground for possible future additions to java time  You may find some useful classes here such as Interval  YearWeek  YearQuarter  and more

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Localization of date string   Based on redsonic s post   private String localizeDate String inputdate  Locale locale          Date date   new Date        SimpleDateFormat dateFormatCN   new SimpleDateFormat  dd-MMM-yyyy   locale              SimpleDateFormat dateFormat   new SimpleDateFormat  dd-MMM-yyyy          try           date   dateFormat parse inputdate         catch  ParseException e            log warn  Input date was not correct  Can not localize it             return inputdate            return dateFormatCN format date      String localizedDate   localizeDate  05-Sep-2013   new Locale  zh   CN       will be like 05-  -2013

[java] SimpleDateFormat and locale based format string

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