java text ParseException Unparseable date

Question

I am getting a parsing exception while I am trying the following code       String date  Sat Jun 01 12 53 10 IST 2013       SimpleDateFormat sdf new SimpleDateFormat  MMM d  yyyy HH mm ss        Date currentdate      currentdate sdf parse date       System out println currentdate     Exception       Exception in thread  main  java text ParseException  Unparseable date   Sat Jun 01 12 53 10 IST 2013    at com ibm icu text DateFormat parse DateFormat java 510    Input  Sat Jun 01 12 53 10 IST 2013  Expected output  Jun 01 2013 12 53 10  How to solve this

User · Answer

Your formatting pattern fails to match the input string, as noted by other Answers.
Your input format is terrible.
You are using troublesome old date-time classes that were supplanted years ago by the java.time classes.

ISO 8601

Instead a format such as yours, use ISO 8601 standard formats for exchanging date-time values as text.

The java.time classes use the standard ISO 8601 formats by default when parsing/generating strings.

Proper time zone name

Specify a proper time zone name in the format of continent/region, such as America/Montreal, Africa/Casablanca, or Pacific/Auckland. Never use the 3-4 letter abbreviation such as EST or IST as they are not true time zones, not standardized, and not even unique(!).

Your IST could mean Iceland Standard Time, India Standard Time, Ireland Standard Time, or others. The java.time classes are left to merely guessing, as there is no logical solution to this ambiguity.

java.time

The modern approach uses the java.time classes.

Define a formatting pattern to match your input strings.

String input = "Sat Jun 01 12:53:10 IST 2013";
DateTimeFormatter f = DateTimeFormatter.ofPattern( "EEE MMM dd HH:mm:ss z uuuu" , Locale.US );
ZonedDateTime zdt = ZonedDateTime.parse( input , f );

zdt.toString(): 2013-06-01T12:53:10Z[Atlantic/Reykjavik]

If your input was not intended for Iceland, you should pre-parse the string to adjust to a proper time zone name. For example, if you are certain the input was intended for India, change IST to Asia/Kolkata.

String input = "Sat Jun 01 12:53:10 IST 2013".replace( "IST" , "Asia/Kolkata" );
DateTimeFormatter f = DateTimeFormatter.ofPattern( "EEE MMM dd HH:mm:ss z uuuu" , Locale.US );
ZonedDateTime zdt = ZonedDateTime.parse( input , f );

zdt.toString(): 2013-06-01T12:53:10+05:30[Asia/Kolkata]

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, & 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, Java SE 10, 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 & 7 in ThreeTen-Backport.
Android
- Later versions of Android bundle implementations of the java.time classes.
- For earlier Android (<26), 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.

User · Answer

Update your format to   SimpleDateFormat sdf new SimpleDateFormat  E MMM dd hh mm ss Z yyyy

User · Answer

String date  Sat Jun 01 12 53 10 IST 2013    SimpleDateFormat sdf new SimpleDateFormat  MMM d  yyyy HH mm ss      This patterns does not tally with your input String which occurs the exception   You need to use following pattern to get the work done   E MMM dd HH mm ss z yyyy   Following code will help you to skip the exception   SimpleDateFormat is used       String date  Sat Jun 01 12 53 10 IST 2013      Input String      SimpleDateFormat simpleDateFormat new SimpleDateFormat  E MMM dd HH mm ss z yyyy       Existing Pattern      Date currentdate simpleDateFormat parse date      Returns Date Format       SimpleDateFormat simpleDateFormat1 new SimpleDateFormat  MMM dd yyyy HH mm ss       New Pattern      System out println simpleDateFormat1 format currentdate       Format given String to new pattern         outputs  Jun 01 2013 12 53 10

User · Answer

Check your Pattern  DD-MMM-YYYY  and the input for the parse  29-11-2018   method  Input to the parse method should follow   DD-MMM-YYYY i e  21-AUG-2019  In My Code   String pattern    DD-MMM-YYYY   SimpleDateFormat simpleDateFormat   new SimpleDateFormat pattern        try           startDate   simpleDateFormat parse  29-11-2018      here no pattern match          endDate   simpleDateFormat parse  28-AUG-2019      Ok        catch  ParseException e               TODO Auto-generated catch block         e printStackTrace

User · Answer

Pattern is wrong       String date  Sat Jun 01 12 53 10 IST 2013       SimpleDateFormat sdf new SimpleDateFormat  E MMM dd hh mm ss Z yyyy        Date currentdate      currentdate sdf parse date       System out println currentdate

User · Answer

Your pattern does not correspond to the input string at all    It is not surprising that it does not work  This would probably work better   SimpleDateFormat sdf   new SimpleDateFormat  EE MMM dd HH mm ss z yyyy                                               Locale ENGLISH     Then to print with your required format you need a second SimpleDateFormat   Date parsedDate   sdf parse date   SimpleDateFormat print   new SimpleDateFormat  MMM d  yyyy HH mm ss    System out println print format parsedDate      Notes    you should include the locale as if your locale is not English  the day name might not be recognised IST is ambiguous and can lead to problems so you should use the proper time zone name if possible in your input

User · Answer

I needed to add a ParsePosition expression to the parse method of class SimpleDateFormat   simpledateformat parse mydatestring  new ParsePosition 0

User · Answer

String date  Sat Jun 01 12 53 10 IST 2013           SimpleDateFormat sdf new SimpleDateFormat  E MMM dd HH mm ss z yyyy            Date currentdate sdf parse date           SimpleDateFormat sdf2 new SimpleDateFormat  MMM dd yyyy HH mm ss            System out println sdf2 format currentdate

User · Answer

I found simple solution to get current date without any parsing error   Calendar calendar  calendar   Calendar getInstance    String customDate        calendar get Calendar YEAR     -     calendar get Calendar MONTH    1     -    calendar get Calendar DAY OF MONTH

[java] java.text.ParseException: Unparseable date

ISO 8601

Proper time zone name

java.time

About java.time

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