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SimpleDateFormat print "." for MMM format

I am trying to convert date string from one format to another using SimpleDateFormat.
Conversion works but there is a dot "." after month.
String dateStr = "04/02/1987";
DateFormat df1 = new SimpleDateFormat("dd/MM/yyyy");
Date d = df1.parse(dateStr);
DateFormat df2 = new SimpleDateFormat("dd MMM yyyy");
System.out.println(df2.format(d));
Output is 04 Feb. 1987 instead of 04 Feb 1987.

What is your Locale.getDefault()?
Different output for alphanumeric date parts may be caused by the Locale the formatter is using. In most cases, the system default Locale is used if you don't specify one yourself. I don't know for sure SimpleDateFormat does so, but it seems likely.
I know that a java.time.format.DateTimeFormatter does so, see the following example which uses java.time, the modern and recommended to use datetime API:
public static void main(String[] args) {
String dateStr = "04/02/1987";
LocalDate localDate = LocalDate.parse(dateStr, DateTimeFormatter.ofPattern("dd/MM/yyyy"));
System.out.println(localDate.format(DateTimeFormatter.ofPattern("dd MMM yyyy",
Locale.ENGLISH)));
System.out.println(localDate.format(DateTimeFormatter.ofPattern("dd MMM yyyy",
Locale.FRENCH)));
}
Output:
04 Feb 1987
04 févr. 1987
The output is (of course) different concerning the name of the month, but using Locale.FRENCH shows a dot after the abbreviated month name. It is possible that your system's default Locale is one that indicates an abbreviation by a dot, too, but is identical to the output format of a Locale.ENGLISH for the numeric parts and the abbreviation of the month.

Please provide Locale.ENGLISH in SimpleDateFormat constructor while creating object as shown below:
String dateStr = "04/02/1987";
DateFormat df1 = new SimpleDateFormat("dd/MM/yyyy");
Date d = df1.parse(dateStr);
DateFormat df2 = new SimpleDateFormat("dd MMM yyyy", Locale.ENGLISH);
System.out.println(df2.format(d));

Talend - Transform "EEE MMM dd hh:mm:ss z yyyy" in "yyyy-MM-dd"

I receive a date from a file in this format: "EEE MMM dd hh:mm:ss z yyyy" and I'm trying to convert this value into Date "yyyy-MM-dd". For that I'm using:
TalendDate.parseDate("yyyy/MM/dd", TalendDate.formatDate("yyyy/MM/dd", TalendDate.parseDate("EEE MMM dd hh:mm:ss z yyyy",context.date)))
The context.date is defined here:
context.date = input_row.mtime_string;
But when I run my JavaRow component I get the following error:
Exception in component tJavaRow_1
"java.lang.RuntimeException: java.text.ParseException: Unparseable date: "Thu Aug 09 10:38:45 BST 2018"
How can I solve this?
Many Thanks!

You could achieve the format using the below code snippet -
System.out.println(input_row.newColumn);
SimpleDateFormat parserSDF = new SimpleDateFormat("EEE MMM dd hh:mm:ss z yyyy", Locale.ENGLISH);
Date date = parserSDF.parse(input_row.newColumn);
String dDate = null;
parserSDF = new SimpleDateFormat("yyyy-MM-dd");
dDate = parserSDF.format(date);
System.out.println(dDate);
Also, you need the below libraries to be imported(Advanced settings section of tJavaRow)-
import java.text.SimpleDateFormat;
import java.util.Locale;
import java.util.Date;
I had directly passed the input value from file(in my scenario tFileInputDelimited) into tJavaRow as - input_row.newColumn and then used SimpleDateFormat class to both parse and format dates according to the formatting pattern.
Read more here.

If you want to convert the date into LocalDate then below code might help:
private LocalDate getLocalDate(String date){
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("EEE MMM dd hh:mm:ss z yyyy", Locale.getDefault());
return LocalDate.parse(date, formatter);
}
And once you get the LocalDate, you can transform it to any format. As the question expects yyyy-MM-dd then just call toString() on LocalDate object.
LocalDate curr = LocalDate.now();
System.out.println(curr.toString());
It will display the date like "2019-11-20".
Hope this helps to someone.

SimpleDateFormat and parseException

I am developing a Web application into GWT and I am using the Object DatePicker. This object retrieves the date in a defined format which I am translating into a String such as:
Wed May 14 2014 00:00
For me it is useful to use this date as String for some operations. However, for one of them I need the Timestamp object. For that reason, I am making use of the SimpleDateFormat object in the following way:
SimpleDateFormat sdf = new SimpleDateFormat("E MMM dd yyyy HH:mm");
Timestamp tDateIni = new Timestamp(sdf.parse(sDateIni).getTime());
Yet, when I run the remote debug I get a ParseException. Do you know what could the mistake be? I think I am using in a bad format the SimpleDateFormat object in the part "E MMM", but I am not sure. Thanks a lot in advance!

If you want to parse the date at client side in GWT then try with DateTimeFormat
DateTimeFormat dateTimeFormat=DateTimeFormat.getFormat("E MMM dd yyyy HH:mm");
Date date=dateTimeFormat.parse("Wed May 14 2014 00:00");
If you want to parse the date at server side then pass the time in milliseconds as long value instead of date string from client side and form the date back at server side using new Date(timeInMills)

Your date format uses the day of the week format that requires "EEE" instead of "E". This is causing the exception when the program is trying to read in your date string. It is expecting one letter for the day of the week.
http://docs.oracle.com/javase/7/docs/api/java/text/SimpleDateFormat.html

Change this from
SimpleDateFormat sdf = new SimpleDateFormat("E MMM dd yyyy HH:mm");
to
SimpleDateFormat sdf = new SimpleDateFormat("EEE MMM dd yyyy HH:mm");
It should be EEE instead of E to represent Weekdays like Wed
Below code, perfectly works (TESTED)
public static void main(String[] args) {
String s = "Wed May 14 2014 00:00";
SimpleDateFormat sdf = new SimpleDateFormat("EEE MMM dd yyyy HH:mm");
try {
Timestamp tDateIni = new Timestamp(sdf.parse(s).getTime());
System.out.println(tDateIni.getTime());
} catch (ParseException ex) {
System.out.println("Parse Error");
}
}

I have added the Locale object in the SimpleDateFormat object and now it works. Thank you for all your help and your comments!!!

Unparseable Date:"Sat Oct 12 09:05:00 IST 2013" exception

I need to parse a string to date. But getting an unparseable exception.
Following is my code:
String str="Sat Oct 12 09:05:00 IST 2013";
SimpleDateFormat format = new SimpleDateFormat("EEE MM DD hh:mm:ss yyyy");
try {
format.parse(str);
} catch (ParseException e) {
e.printStackTrace();
}

Your format has several issues:
SimpleDateFormat format = new SimpleDateFormat("EEE MMM dd HH:mm:ss z yyyy", Locale.US);
D denotes day in year, not day in month
You're missing the time zone
The format for month is incorrect
Since you're time is in 24-hour format, you need H instead of h
Refer to SimpleDateFormat documentation for information on Date and Time Patterns.

Your format for parsing that string is wrong. You need to use this format.
SimpleDateFormat format = new SimpleDateFormat("EEE MMM dd HH:mm:ss z yyyy"); // Default Locale
MMM - is the proper month format in your case
z - you missed the pattern for timezone
d - represents the day in the month not D which represents day in the year.
And as suggested, you might want to use H instead of h as the hour seems to be in the 24-hour format.
Have a look at the docs to learn more about the Date and Time Patterns.

Java DateTime format for this one

What is the Java DateTime format for this one?
Mon Nov 26 13:57:03 SGT 2012
I want to convert this string to Date and convert it to another format like "yyyy-MM-dd HH:mm:ss".
To convert from date to string is not hard.
Format formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
But I find no valid format to convert "Mon Nov 26 13:57:03 SGT 2012" to become date format...
=====
found solution:
DateFormat oldDateFormat = new SimpleDateFormat("EEE MMM dd HH:mm:ss z yyyy");
Format newDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date oldDate = oldDateFormat.parse(oldTimeString);
String newDateString = newDateFormat.format(oldDate);

This will work, EEE MMM dd HH:mm:ss z yyyy
You can find examples in the javadoc of SimpleDateFormat. See http://docs.oracle.com/javase/6/docs/api/java/text/SimpleDateFormat.html

Try SimpleDateFormat.parse() function to convert the string to Date.
SimpleDateFormat sdf = new SimpleDateFormat("EEE MMM dd HH:mm:ss z yyyy");
Date parseDate = sdf.parse(strInput);
Watch out for the Parse Exception

Well, this code produces some output
import java.util.*;
import java.text.*;
public class Test {
public static void main(String[] args) throws ParseException {
DateFormat inputFormat = new SimpleDateFormat("E MMM dd HH:mm:ss z yyyy",
Locale.US);
DateFormat outputFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss",
Locale.US);
String text = "Mon Nov 26 13:57:03 SGT 2012";
Date date = inputFormat.parse(text);
System.out.println(outputFormat.format(date));
}
}
... but it uses the default system time zone for output. It's not clear what time zone you want the result in. There's nothing in Date to store the time zone, which makes it hard to preserve the original time zone given in the text, so you'll need to decide for yourself which zone to use.
Note that I've specified Locale.US in both input and output; that's typically appropriate when you're specifying a custom format, particularly for the input which relies on month and day names.
As noted in comments, I would personally recommend using Joda Time if you possibly can for date/time work... it's a far better API than Date/Calendar. Unfortunately, Joda Time is incapable of parsing time zones - from the docs for DateTimeFormat:
Zone names: Time zone names ('z') cannot be parsed.
It's also worth noting that if there's any way you can affect the input data, moving them away from using time zone abbreviations would be a good step.

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
public class CPDateTime
{
public static void main(String[] args)
{
Calendar cal = Calendar.getInstance();
//subtracting a day
//cal.add(Calendar.DATE, -1);
cal.add(Calendar.MONTH, -1);
SimpleDateFormat prev_day = new SimpleDateFormat("dd");
SimpleDateFormat prev_month = new SimpleDateFormat("MM");
SimpleDateFormat prev_year = new SimpleDateFormat("YYYY");
String prev_day_str = prev_day.format(new Date(cal.getTimeInMillis()));
System.out.println(prev_day_str);
String prev_month_str = prev_month.format(new Date(cal.getTimeInMillis()));
System.out.println(prev_month_str);
String prev_year_str = prev_year.format(new Date(cal.getTimeInMillis()));
System.out.println(prev_year_str);
}
}