How to convert a String to a Date using SimpleDateFormat

Question

I have this code snippet   DateFormat formatter1  formatter1   new SimpleDateFormat  mm DD yyyy    System out println  Date formatter1 parse  08 16 2011       When I run this  I get this as the output   Sun Jan 16 00 10 00 IST 2011   I expected   Tue Aug 16  Whatever Time  IST 2011   I mean to say I am not getting the month as expected  What is the mistake

User · Answer

DateTimeFormatter dateFormatter   DateTimeFormatter ofPattern  MM dd uuuu        System out println LocalDate parse  08 16 2011   dateFormatter      Output      2011-08-16   I am contributing the modern answer  The answer by Bohemian is correct and was a good answer when it was written 6 years ago  Now the notoriously troublesome SimpleDateFormat class is long outdated and we have so much better in java time  the modern Java date and time API  I warmly recommend you use this instead of the old date-time classes   What went wrong in your code   When I parse 08 16 2011 using your snippet  I get Sun Jan 16 00 08 00 CET 2011  Since lowercase mm is for minutes  I get 00 08 00  8 minutes past midnight   and since uppercase DD is for day of year  I get 16 January   In java time too format pattern strings are case sensitive  and we needed to use uppercase MM for month and lowercase dd for day of month   Question  Can I use java time with my Java version   Yes  java time works nicely on Java 6 and later and on both older and newer Android devices    In Java 8 and later and on new Android devices  from API level 26  I   m told  the modern API comes built-in  In Java 6 and 7 get the ThreeTen Backport  the backport of the new classes  ThreeTen for JSR 310  see the links at the bottom   On  older  Android use the Android edition of ThreeTen Backport  It   s called ThreeTenABP  And make sure you import the date and time classes from org threeten bp with subpackages    Links   Oracle tutorial  Date Time explaining how to use java time  Java Specification Request  JSR  310  where java time was first described  ThreeTen Backport project  the backport of java timeto Java 6 and 7  ThreeTen for JSR-310   ThreeTenABP  Android edition of ThreeTen Backport Question  How to use ThreeTenABP in Android Project  with a very thorough explanation

User · Answer

you can solve the problem much simple  like  First convert the the given string to the date object   eg    java util Date date1   new Date  11 19 2015     SimpleDateFormat formatter   new SimpleDateFormat  MMM dd yyyy HH mma    String format   formatter format date   System out println format

User · Answer

String newstr    08 16 2011   SimpleDateFormat format1   new SimpleDateFormat  MM dd yyyy    SimpleDateFormat format   new SimpleDateFormat  EE MMM dd hh mm ss z yyyy    Calendar c   Calendar getInstance    c setTime format1 parse newstr    System out println format format c getTime

User · Answer

You have used some type errors  If you want to set 08 16 2011 to following pattern  It is wrong because    mm stands for minutes  use MM as it is for Months  DD is wrong  it should be dd which represents Days  Try this to achieve the output you want to get    Tue Aug 16  Whatever Time  IST 2011         String date    08 16 2011     input date as String      SimpleDateFormat simpleDateFormat   new SimpleDateFormat  MM dd yyyy       date pattern      Date myDate   simpleDateFormat parse date      returns date object       System out println myDate     outputs  Tue Aug 16 00 00 00 IST 2011

User · Answer

String localFormat   android text format DateFormat getBestDateTimePattern Locale getDefault     EEEE MMMM d    return new SimpleDateFormat localFormat  Locale getDefault    format localMidnight     will return a format based on device s language  Note that getBestDateTimePattern   returns  the best possible localized form of the given skeleton for the given locale

User · Answer

Use the below function             Format a time from a given format to given target format                 param inputFormat         param inputTimeStamp         param outputFormat         return         throws ParseException             private static String TimeStampConverter final String inputFormat              String inputTimeStamp  final String outputFormat              throws ParseException           return new SimpleDateFormat outputFormat  format new SimpleDateFormat                  inputFormat  parse inputTimeStamp            Sample Usage is as Following       try           String inputTimeStamp    08 16 2011            final String inputFormat    MM dd yyyy           final String outputFormat    EEE MMM dd HH mm ss z yyyy            System out println TimeStampConverter inputFormat  inputTimeStamp                  outputFormat           catch  ParseException e               TODO Auto-generated catch block         e printStackTrace

User · Answer

Very Simple Example is   SimpleDateFormat simpleDateFormat   new SimpleDateFormat  dd-MM-yyyy                    Date date   new Date                    Date date1   new Date                try                   System out println  Date1      date1                   System out println  date    date                    date   simpleDateFormat parse  01-01-2013                    date1   simpleDateFormat parse  06-15-2013                     System out println  Date1 is   date1                   System out println  date    date                  catch  Exception e                    System out println e getMessage

User · Answer

This piece of code helps to convert back and forth      System out println  Date     String valueOf new Date          SimpleDateFormat dt   new SimpleDateFormat  yyyy-MM-dd HH mm ss        String stringdate   dt format new Date         System out println  String valueOf date     stringdate        try       Date date   dt parse stringdate       System out println  parse date     String valueOf date          catch  ParseException e        e printStackTrace

User · Answer

Try this   new SimpleDateFormat  MM dd yyyy      MM is  month   not mm  dd is  day   not DD    It s all in the javadoc for SimpleDateFormat  FYI  the reason your format is still a valid date format is that    mm is  minutes  DD is  day in year    Also  you don t need the cast to Date    it already is a Date  or it explodes    public static void main String   args  throws ParseException       System out println new SimpleDateFormat  MM dd yyyy   parse  08 16 2011         Output   Tue Aug 16 00 00 00 EST 2011   Voila

User · Answer

m - min M - Months  Letter  Date or Time Component  Presentation    Examples G       Era designator          Text                AD y       Year                    Year                1996  96 M       Month in year           Month               July  Jul  07 w       Week in year            Number              27 W       Week in month           Number              2 D       Day in year             Number              189 d       Day in month            Number              10 F       Day of week in month    Number              2 E       Day in week             Text                Tuesday  Tue a       Am pm marker            Text                PM H       Hour in day  0-23       Number              0 k       Hour in day  1-24       Number              24 K       Hour in am pm  0-11     Number              0 h       Hour in am pm  1-12     Number              12 m       Minute in hour          Number              30 s       Second in minute        Number              55 S       Millisecond             Number              978 z       Time zone               General time zone   Pacific Standard Time  PST  GMT-08 00 Z       Time zone               RFC 822 time zone   -0800

[java] How to convert a String to a Date using SimpleDateFormat?

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