How to parse a date

Question

I am trying to parse this date with SimpleDateFormat and it is not working   import java text ParseException  import java text SimpleDateFormat  import java util Date   public class Formaterclass       public static void main String   args  throws ParseException          String strDate    Thu Jun 18 20 56 02 EDT 2009           SimpleDateFormat formatter   new SimpleDateFormat  yyyy-MM-dd            Date dateStr   formatter parse strDate           String formattedDate   formatter format dateStr           System out println  yyyy-MM-dd date is    gt   formattedDate           Date date1   formatter parse formattedDate            formatter   new SimpleDateFormat  dd-MMM-yyyy            formattedDate   formatter format date1           System out println  dd-MMM-yyyy date is    gt   formattedDate             If I try this code with strDate  2008-10-14   I have a positive answer  What s the problem  How can I parse this format   PS  I got this date from a jDatePicker and there is no instruction on how modify the date format I get when the user chooses a date

User · Answer

How about getSelectedDate  Anyway  specifically on your code question  the problem is with this line   new SimpleDateFormat  yyyy-MM-dd      The string that goes in the constructor has to match the format of the date  The documentation for how to do that is here  Looks like  you need something close to  EEE MMM d HH mm ss zzz yyyy

User · Answer

We now have a more modern way to do this work   java time  The java time framework is bundled with Java 8 and later  See Tutorial  These new classes are inspired by Joda-Time  defined by JSR 310  and extended by the ThreeTen-Extra project  They are a vast improvement over the troublesome old classes  java util Date  Calendar et al   Note that the 3-4 letter codes like EDT are neither standardized nor unique  Avoid them whenever possible  Learn to use ISO 8601 standard formats instead  The java time framework may take a stab at translating  but many of the commonly used codes have duplicate values   By the way  note how java time by default generates strings using the ISO 8601 formats but extended by appending the name of the time zone in brackets   String input    Thu Jun 18 20 56 02 EDT 2009   DateTimeFormatter formatter   DateTimeFormatter ofPattern    EEE MMM d HH mm ss zzz yyyy    Locale ENGLISH    ZonedDateTime zdt   formatter parse   input   ZonedDateTime    from      Dump to console   System out println    zdt       zdt      When run      zdt   2009-06-18T20 56 02-04 00 America New York    Adjust Time Zone  For fun let s adjust to the India time zone   ZonedDateTime zdtKolkata   zdt withZoneSameInstant   ZoneId of    Asia Kolkata            zdtKolkata   2009-06-19T06 26 02 05 30 Asia Kolkata    Convert to j u Date  If you really need a java util Date object for use with classes not yet updated to the java time types  convert  Note that you are losing the assigned time zone  but have the same moment automatically adjusted to UTC   java util Date date   java util Date from  zdt toInstant

User · Answer

The problem is that you have a date formatted like this   Thu Jun 18 20 56 02 EDT 2009   But are using a SimpleDateFormat that is   yyyy-MM-dd   The two formats don t agree   You need to construct a SimpleDateFormat that matches the layout of the string you re trying to parse into a Date   Lining things up to make it easy to see  you want a SimpleDateFormat like this   EEE MMM dd HH mm ss zzz yyyy Thu Jun 18 20 56 02 EDT 2009   Check the JavaDoc page I linked to and see how the characters are used

User · Answer

You cannot expect to parse a date with a SimpleDateFormat that is set up with a different format     To parse your  Thu Jun 18 20 56 02 EDT 2009  date string you need a SimpleDateFormat like this  roughly    SimpleDateFormat parser new SimpleDateFormat  EEE MMM d HH mm ss zzz yyyy      Use this to parse the string into a Date  and then your other SimpleDateFormat to turn that Date into the format you want           String input    Thu Jun 18 20 56 02 EDT 2009           SimpleDateFormat parser   new SimpleDateFormat  EEE MMM d HH mm ss zzz yyyy            Date date   parser parse input           SimpleDateFormat formatter   new SimpleDateFormat  yyyy-MM-dd            String formattedDate   formatter format date                  JavaDoc  http   docs oracle com javase 7 docs api java text SimpleDateFormat html

User · Answer

In response to   How to convert Tue Sep 13 2016 00 00 00 GMT-0500  Hora de verano central  M  xico   to dd-MM-yy in Java    it was marked how duplicate  Try this  With java util Date  java text SimpleDateFormat  it s a simple solution    public static void main String   args  throws ParseException        String fecha    Tue Sep 13 2016 00 00 00 GMT-0500  Hora de verano central  M  xico         Date f   new Date fecha        SimpleDateFormat sdf   new SimpleDateFormat  dd MM yyyy        sdf setTimeZone TimeZone getTimeZone  -5GMT         fecha   sdf format f       System out println fecha

[java] How to parse a date?

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