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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 ==>"+formattedDate);
        Date date1 = formatter.parse(formattedDate);
        formatter = new SimpleDateFormat("dd-MMM-yyyy");
        formattedDate = formatter.format(date1);
        System.out.println("dd-MMM-yyyy date is ==>"+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.
                For parsing/formatting dates with Java 8, have a look at this answer: stackoverflow.com/questions/22463062/…
– micha
                Mar 30, 2014 at 10:02
                Why is there no method in apache DateUtils which takes in util dates and gives out an integer.
– Arun Gowda
                Oct 3, 2022 at 14:29
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
                having the same issue ... it works good on Java7,   but fails  on parsing  "Thu Jun ..." as "EEE MMM ..."  in Java6.   Any ideas ?
– d.raev
                Apr 1, 2013 at 11:47
                eventuell new SimpleDateFormat("EEE MMM d HH:mm:ss zzz yyyy",Locale.ENGLISH); could be needed if current locale != ENGLISH
– Nightingale7
                Apr 22, 2013 at 13:44
                Note that SimpleDateFormat is configured with a TimeZone either by default or by calling the setTimeZone method. That time zone is used during parsing if and only if a time zone is not indicated in the string to be parsed.
– Marcus Junius Brutus
                Jan 8, 2019 at 21:08
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.
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() );
                how to parce Sun Dec 06 11:15:00 IST 2015 date format to dd mm yyyy i am not able to parce with SimpleDateFormat("EEE MMM dd HH:mm:ss z yyyy", Locale.ENGLISH) tried with bot Z and z
– Sagar
                Dec 11, 2018 at 9:27
                The device targeting 4.4 eureka and Asus 5.1 having parsing issue on app language change to non English languages like Marathi/Hindi normal date able to parse of  dd mm yyyy
– Sagar
                Dec 12, 2018 at 5:17
                @SagarHudge  Specify a Locale on the DateTimeFormatter to determine the human language and cultural norms used in translation.
– Basil Bourque
                Dec 12, 2018 at 6:12
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" 
In response to:
"How to convert Tue Sep 13 2016 00:00:00 GMT-0500 (Hora de verano central (México)) 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 (México))";
    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);