Java. Cant parse date using DateFormat - java

I have a date string:
Thu Feb 20 08:00:00 EET 1992
And using this code to format it:
String datePatternFrom = "EEE MMM dd HH:mm:ss ZZZ yyyy";
String datePatternTo = "MMM dd, yyyy";
String prettyDate = "";
try {
DateFormat fromFormatter = new SimpleDateFormat(datePatternFrom);
Date date = (Date)fromFormatter.parse(userBirthday.toString());
DateFormat toFormatter = new SimpleDateFormat(datePatternTo);
prettyDate = toFormatter.format(date);
} catch (ParseException e) {
e.printStackTrace();
}
Why I'am getting the exception?
java.text.ParseException: Unparseable date: "Thu Feb 20 08:00:00 EET 1992" (at offset 0)

The problem is with the weekday and month and your locale.
Thu is English, so you have to tell the parser that it should use English weekdays:
DateFormat fromFormatter = new SimpleDateFormat(datePatternFrom, Locale.US);
This will work for your pattern.
If you do not specify a locale, the default will be used, which is not always an English one. ;-)

It could be your locale. Try making a SDF with datePatternFrom, give it a date to format and print that somewhere. See what pops up.

Probably your userBirthday object was not created as a java.util.Date object. Can you try a System.out.println(userBirthday.getClass().getName());?

Related

Local Date to UTC conversion

I'm trying to convert system local date to UTC. Below is my code and it looks working for MST and EST formats. But, it is not working as expected.
String inputDate = "Wed Apr 13 04:00:00 IST 2022";
SimpleDateFormat sdf = new SimpleDateFormat("EEE MMM dd HH:mm:ss zzz yyyy");
Date date = sdf.parse(inputDate);
DateFormat formatUTC = new SimpleDateFormat("MM/dd/yyyy");
formatUTC.setTimeZone(TimeZone.getTimeZone("UTC"));
String result = formatUTC.format(date);
System.out.print(result); // 04/13/2022
I see that IST zone is 5hrs 30mins ahead from the UTC universal time. So, I should get 04/12/2022 for the given input. But, getting 04/13/2022. what am I doing wrong here? Please advise.
Try setting the timezone for inputDate as well. Try the below code:
String inputDate = "Wed Apr 13 04:00:00 IST 2022";
SimpleDateFormat sdf = new SimpleDateFormat("EEE MMM dd HH:mm:ss zzz yyyy");
sdf.setTimeZone(TimeZone.getTimeZone("Asia/Kolkata"));
Date date = sdf.parse(inputDate);
DateFormat formatUTC = new SimpleDateFormat("MM/dd/yyyy");
formatUTC.setTimeZone(TimeZone.getTimeZone("UTC"));
String result = formatUTC.format(date);
System.out.print(result);
Take a look at this answer.

Why does my SimpleDateFormat parsing not work?

I need help parsing the String date
"Thu Oct 22 13:51:51 CEST 2015"
with SimpleDateFormat, but I'm not able to find the correct pattern.
Here is what I've tried
String date = "Thu Oct 22 13:51:51 CEST 2015";
try {
SimpleDateFormat dateFormat = new SimpleDateFormat("E M d H:m:s z y");
d1 = dateFormat.parse(date);
} catch (ParseException e1) {
Log.e(null, String.valueOf(e1));
}
I get back the error:
java.text.ParseException: Unparseable date: "Thu Oct 22 13:51:51 CEST 2015" (at offset 0)
UPDATE
I tried the solution below by durron597 adapting it to my needs:
String date = "Thu Oct 22 13:51:51 CEST 2015";
try {
SimpleDateFormat dateFormat = new SimpleDateFormat("E MMM dd HH:mm:ss zzzz yyyy", Locale.US);
Date d1 = dateFormat.parse(date);
} catch (ParseException e1) {
Log.e("null", String.valueOf(e1));
}
but in the logcat I keep getting the error:
java.text.ParseException: Unparseable date: "Thu Oct 22 13:51:51 CEST 2015" (at offset 20)
Use more letters for the longer versions of the Date elements.
In particular the problem in your case was probably the Month portion, which you can see from this part of the Javadoc for SimpleDateFormat:
Month: If the number of pattern letters is 3 or more, the month is interpreted as text; otherwise, it is interpreted as a number.
You only had one character for Month, it tried to interpet it as a number, found a letter, and failed.
You also need to specify the US locale, as these are United States dates.
Specify the Locale to use in translating the name of the day of the week, “Thu”. You are in Italy (it says so in your profile); when I use Locale.Italy on my machine, I get the same error as you do. If you specify Locale.US as in the below code, it should work.
Update: Android doesn't support three letter time zones, according to this:
Other than the special cases "UTC" and "GMT" (which are synonymous in this context, both corresponding to UTC), Android does not support the deprecated three-letter time zone IDs used in Java 1.1.
You should be able to replace your Europe time zone with the full name of the time zone defined in the official “tz” time zone database (formerly known as Olson database). For example, Europe/Rome instead of "CEST".
Try this instead:
SimpleDateFormat dateFormat = new SimpleDateFormat("E MMM dd HH:mm:ss zzzz yyyy", Locale.US);
date.replace("CEST", "Europe/Rome");
Date d1 = dateFormat.parse(date);
Here's a full working example:
public class DateExample {
public static void main(String[] args) {
String date = "Thu Oct 22 13:51:51 CEST 2015";
try {
SimpleDateFormat dateFormat = new SimpleDateFormat("E MMM dd HH:mm:ss zzzz yyyy", Locale.US);
date.replace("CEST", "Europe/Rome");
Date d1 = dateFormat.parse(date);
System.out.println(d1);
} catch (ParseException e1) {
e1.printStackTrace();
}
}
}
Output:
Thu Oct 22 06:51:51 CDT 2015

Trouble parsing Java Date Object?

I am receiving a Java Date formatted like so: "Sun Sep 14 02:00:00 PDT 2014" into a yyyy-MM-dd format but I can't seem to parse it. What I tried is the following:
String time = "Sun Sep 14 02:00:00 PDT 2014";
SimpleDateFormat f = new SimpleDateFormat("yyyy-MM-dd");
Date contractEffectiveDateFormat = f.parse(time);
System.out.println("Date: " + contractEffectiveDateFormat);
However, I get an error saying that this date is unparsable. I'm not sure how to go about parsing this date because if I try to parse the date using the following:
DateFormat df = new SimpleDateFormat("EEE MMM dd kk:mm:ss z yyyy");
which is how to actually parse the date correctly into a Date object,
the string would turn into a Date object, but I can't seem to do anything with it from there. I want to turn it in so that it looks like 2014-09-14. Any ideas on how to do so? Thanks!
Use two DateFormat(s) one for input and for output,
String time = "Sun Sep 14 02:00:00 PDT 2014";
DateFormat out = new SimpleDateFormat("yyyy-MM-dd");
DateFormat in = new SimpleDateFormat("EEE MMM dd kk:mm:ss z yyyy");
try {
Date effectiveDate = in.parse(time);
System.out.println("Date: " + out.format(effectiveDate));
} catch (ParseException e) {
e.printStackTrace();
}
Output is the requested
Date: 2014-09-14
Your incoming string is this String time = "Sun Sep 14 02:00:00 PDT 2014";
which means the SimpleDateFormat pattern should match the incoming String pattern so you need to use SimpleDateFormat like this
DateFormat inFormat=new SimpleDateFormat("EEE MMM dd kk:mm:ss z yyyy",Locale.ENGLISH);
Then when you called parse() on inFormat it will give you Date Object which doesnot have particular format associated with it. So in order to format the Date again you need to create SimpleDateFormat object specifying the format you want which is this
DateFormat outFormat = new SimpleDateFormat("yyyy-MM-dd", Locale.ENGLISH);
Ultimately bind all together
One more thing always specify the Locale
String time = "Sun Sep 14 02:00:00 PDT 2014";
DateFormat outFormat = new SimpleDateFormat("yyyy-MM-dd", Locale.ENGLISH);
// good practice to specify the locale
DateFormat inFormat=new SimpleDateFormat("EEE MMM dd kk:mm:ss z yyyy",Locale.ENGLISH);
try {
Date parsedDate = inFormat.parse(time);
System.out.println("Required Formatted Date: " + outFormat.format(effectiveDate));
} catch (ParseException e) {
e.printStackTrace();
}
Simply add another SimpleDateFormat that'll allow you to present the Date object the way you want:
public static void main(String[] args) throws ParseException {
String time = "Sun Sep 14 02:00:00 PDT 2014";
DateFormat df = new SimpleDateFormat("EEE MMM dd kk:mm:ss z yyyy");
Date contractEffectiveDateFormat = df.parse(time);
System.out.println("Date: " + contractEffectiveDateFormat);
SimpleDateFormat f = new SimpleDateFormat("yyyy-MM-dd");
System.out.println(f.format(contractEffectiveDateFormat)); // prints 2014-09-14
}

How to convert string (Twitter4j format) to Java Date

I would like to extract date and year from the following string and convert it to a Data Object in Java.
Mon Jul 07 19:18:26 CEST 2014
How can I extract only date and year (in this case, 2014-07-07) from the text in a sophisticated way?
SimpleDateFormat s = new SimpleDateFormat("dd/MMM/yyyy");
String dateInString = "Mon Jul 07 19:18:26 CEST 2014";
SimpleDateFormat myFormat = new SimpleDateFormat("yyyy-MM-dd");
try {
Date date = s.parse(dateInString.split(" ")[2]+"/"+dateInString.split(" ")[1]+"/"+dateInString.split(" ")[5]);
System.out.println(new SimpleDateFormat("YYYY-MM-dd").format(date));
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
This should work for you, I splitted your String, then put it to a date format and then formatted it the way you wanted it to be, assumed you wanted the months as the second parameter after the year, if thats not the case you can simply change the 'MM' to 'dd' and the 'dd' to 'MM'.
For Java 7 or below, use a SimpleDateFormat for parsing and formatting:
Locale dateLocale = Locale.US;
SimpleDateFormat inFormat = new SimpleDateFormat("E MMM dd HH:mm:ss z yyyy", dateLocale);
Date date = inFormat.parse("Mon Jul 07 19:18:26 CEST 2014");
SimpleDateFormat outFormat = new SimpleDateFormat("yyyy-MM-dd", dateLocale);
System.out.println(outFormat.format(date));
Since Java 8, you can use DateTimeFormatter:
Locale dateLocale = Locale.US;
DateTimeFormatter inFormatter = DateTimeFormatter.ofPattern("E MMM dd HH:mm:ss z yyyy", dateLocale);
TemporalAccessor date = inFormatter.parse("Mon Jul 07 19:18:26 CEST 2014");
DateTimeFormatter outFormatter = DateTimeFormatter.ISO_LOCAL_DATE;
System.out.println(outFormatter.format(date));

Date format issue : Convert from String to Date

All,
I need to convert the following string "Tue Jan 01 08:00:00 CET 2013" to a date object with format "dd/MM/yyyy HH:mm".
What I have done till now...
String dateStr = "Tue Jan 01 08:00:00 CET 2013";
DateFormat readFormat = new SimpleDateFormat("E MMM dd HH:mm:ss Z yyyy");
DateFormat writeFormat = new SimpleDateFormat("dd/MM/yyyy HH:mm");
Date date = null;
try
{
date = readFormat.parse(dateStr);
} catch ( ParseException e )
{
e.printStackTrace();
}
String formattedDate = "";
if( date != null )
{
formattedDate = writeFormat.format(date);
}
System.out.println(formattedDate);
But this gives me a String as a result and not a date. If I parse the formattedDate String again using the writeFormat then I get the same original date back again i.e. Tue Jan 01 08:00:00 CET 2013.
NOTE: Finally, I want to push the date into MySQL DateTime datatype via Java Date object. i.e. String -> Java Date -> MySQL Date Time.
I have searched High/Low on the web and could not find a proper solution. Please help!!!
Thanks and regards,
SG
I found the answer.
DateFormat readFormat = new SimpleDateFormat("E MMM dd HH:mm:ss Z yyyy");
date = readFormat.parse(string);
And then while saving to MYSQL database...
pstmt.setDate(5, new java.sql.Date(change.getEndDateTime().getTime()));
Thanks for all your responses and apologies for posting duplicate if it is...
Regards,
SG

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