How can I change the date format in Java

Question

I need to change the date format using Java from    dd MM yyyy  to yyyy MM dd

User · Answer

many ways to change date format   private final String dateTimeFormatPattern    yyyy MM dd   private final Date now   new Date       final DateFormat format   new SimpleDateFormat dateTimeFormatPattern     final String nowString   format format now        final Instant instant   now toInstant       final DateTimeFormatter formatter           DateTimeFormatter ofPattern             dateTimeFormatPattern  withZone ZoneId systemDefault        final String formattedInstance   formatter format instant           Java 8 needed     LocalDate date   LocalDate now      String text   date format formatter     LocalDate parsedDate   LocalDate parse text  formatter

User · Answer

SimpleDateFormat sdf   new SimpleDateFormat  yyyy MM dd    sdf format new Date       This should do the trick

User · Answer

Or you could go the regex route   String date    10 07 2010   String newDate   date replaceAll     d      d      d       3  2  1    System out println newDate     It works both ways too  Of course this won t actually validate your date and will also work for strings like  21432 32423 52352   You can use     d 2      d 2      d 4   to be more exact in the number of digits in each group  but it will only work from dd MM yyyy to yyyy MM dd and not the other way around anymore  and still accepts invalid numbers in there like 45   And if you give it something invalid like  blabla  it will just return the same thing back

User · Answer

Use SimpleDateFormat      String DATE FORMAT    yyyy MM dd       SimpleDateFormat sdf   new SimpleDateFormat DATE FORMAT       System out println  Formated Date     sdf format date      Complete Example   import java text SimpleDateFormat  import java util Date   public class JavaSimpleDateFormatExample       public static void main String args                 Create Date object          Date date   new Date               Specify the desired date format         String DATE FORMAT    yyyy MM dd              Create object of SimpleDateFormat and pass the desired date format          SimpleDateFormat sdf   new SimpleDateFormat DATE FORMAT                         Use format method of SimpleDateFormat class to format the date                      System out println  Today is     sdf format date

User · Answer

SimpleDateFormat newDateFormat   new SimpleDateFormat  dd MM yyyy    Date myDate   newDateFormat parse  28 12 2013    newDateFormat applyPattern  yyyy MM dd   String myDateString   newDateFormat format myDate     Now MyDate   2013 12 28

User · Answer

This is just Christopher Parker s answer adapted to use the new1 classes from Java 8   final DateTimeFormatter OLD FORMATTER   DateTimeFormatter ofPattern  dd MM yyyy    final DateTimeFormatter NEW FORMATTER   DateTimeFormatter ofPattern  yyyy MM dd     String oldString    26 07 2017   LocalDate date   LocalDate parse oldString  OLD FORMATTER   String newString   date format NEW FORMATTER     1 well  not that new anymore  Java 9 should be released soon

User · Answer

To Change the format of Date you have Require both format look below    String stringdate1    28 04 2010       try         SimpleDateFormat format1   new SimpleDateFormat  dd MM yyyy         Date date1   format1 parse        SimpleDateFormat format2   new SimpleDateFormat  yyyy MM dd          String stringdate2   format2 format date1         catch  ParseException e       e printStackTrace        here stringdate2 have date format of yyyy MM dd  and it contain 2010 04 28

User · Answer

SimpleDateFormat format1   new SimpleDateFormat  yyyy MM dd    System out println format1 format date

User · Answer

How to convert from one date format to another using SimpleDateFormat   final String OLD FORMAT    dd MM yyyy   final String NEW FORMAT    yyyy MM dd       August 12  2010 String oldDateString    12 08 2010   String newDateString   SimpleDateFormat sdf   new SimpleDateFormat OLD FORMAT   Date d   sdf parse oldDateString   sdf applyPattern NEW FORMAT   newDateString   sdf format d

User · Answer

tl dr  LocalDate parse        23 01 2017          DateTimeFormatter ofPattern   dd MM uuuu    Locale UK      format      DateTimeFormatter ofPattern   uuuu MM dd    Locale UK          2017 01 23   Avoid legacy date-time classes  The answer by Christopher Parker is correct but outdated  The troublesome old date-time classes such as java util Date  java util Calendar  and java text SimpleTextFormat are now legacy  supplanted by the java time classes   Using java time  Parse the input string as a date-time object  then generate a new String object in the desired format   The LocalDate class represents a date-only value without time-of-day and without time zone   DateTimeFormatter fIn   DateTimeFormatter ofPattern   dd MM uuuu    Locale UK        As a habit  specify the desired expected locale  though in this case the locale is irrelevant  LocalDate ld   LocalDate parse   23 01 2017    fIn      Define another formatter for the output    DateTimeFormatter fOut   DateTimeFormatter ofPattern   uuuu MM dd    Locale UK    String output   ld format  fOut         2017 01 23   By the way  consider using standard ISO 8601 formats for strings representing date-time values     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   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   The ThreeTenABP project adapts ThreeTen-Backport  mentioned above  for Android specifically  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     Joda-Time  UPDATE  The Joda-Time project is now in maintenance mode  with the team advising migration to the java time classes  This section here is left for the sake of history   For fun  here is his code adapted for using the Joda-Time library         2013 Basil Bourque  This source code may be used freely forever by anyone taking full responsibility for doing so     import org joda time       import org joda time format     final String OLD FORMAT    dd MM yyyy   final String NEW FORMAT    yyyy MM dd       August 12  2010 String oldDateString    12 08 2010   String newDateString   DateTimeFormatter formatterOld   DateTimeFormat forPattern OLD FORMAT   DateTimeFormatter formatterNew   DateTimeFormat forPattern NEW FORMAT   LocalDate localDate   formatterOld parseLocalDate  oldDateString    newDateString   formatterNew print  localDate      Dump to console     System out println   localDate      localDate    System out println   newDateString      newDateString      When run     localDate  2010-08-12 newDateString  2010 08 12

[java] How can I change the date format in Java?

Examples related to java

Examples related to date