How to parse month full form string using DateFormat in Java

Question

I tried this   DateFormat fmt   new SimpleDateFormat  MMMM dd  yyyy    Date d   fmt parse  June 27  2007      error   Exception in thread  main  java text ParseException  Unparseable date   June 27   2007   The java docs say I should use four characters to match the full form   I m only able to use MMM successfully with abbreviated months like  Jun  but i need to match full form      Text   For formatting  if the number   of pattern letters is 4 or more  the   full form is used  otherwise a short   or abbreviated form is used if   available  For parsing  both forms are   accepted  independent of the number of   pattern letters    https   docs oracle com javase 6 docs api java text SimpleDateFormat html

User · Answer

You are probably using a locale where the month names are not "January", "February", etc. but some other words in your local language.

Try specifying the locale you wish to use, for example Locale.US:

DateFormat fmt = new SimpleDateFormat("MMMM dd, yyyy", Locale.US);
Date d = fmt.parse("June 27,  2007");

Also, you have an extra space in the date string, but actually this has no effect on the result. It works either way.

User · Answer

val currentTime   Calendar getInstance   time SimpleDateFormat  MMMM   Locale getDefault    format date time

User · Answer

LocalDate from java time Use LocalDate from java time  the modern Java date and time API  for a date     DateTimeFormatter dateFormatter   DateTimeFormatter ofPattern  quot MMMM d  u quot   Locale ENGLISH       LocalDate date   LocalDate parse  quot June 27  2007 quot   dateFormatter       System out println date    Output   2007-06-27  As others have said already  remember to specify an English-speaking locale when your string is in English  A LocalDate is a date without time of day  so a lot better suitable for the date from your string than the old Date class  Despite its name a Date does not represent a date but a point in time that falls on at least two different dates in different time zones of the world  Only if you need an old-fashioned Date for an API that you cannot afford to upgrade to java time just now  convert like this      Instant startOfDay   date atStartOfDay ZoneId systemDefault    toInstant        Date oldfashionedDate   Date from startOfDay       System out println oldfashionedDate    Output in my time zone   Wed Jun 27 00 00 00 CEST 2007  Link Oracle tutorial  Date Time explaining how to use java time

User · Answer

Just to top this up to the new Java 8 API   DateTimeFormatter formatter   new DateTimeFormatterBuilder   appendPattern  MMMM dd  yyyy   toFormatter    TemporalAccessor ta   formatter parse  June 27  2007    Instant instant   LocalDate from ta  atStartOfDay   atZone ZoneId systemDefault    toInstant    Date d   Date from instant   assertThat d getYear    is 107    assertThat d getMonth    is 5      A bit more verbose but you also see that the methods of Date used are deprecated  -  Time to move on

[java] How to parse month full form string using DateFormat in Java?

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