Issue With Converting String to LocalDate [duplicate]

Question

I am trying to convert a string date format to another date format(dd-MMM-yyyy) using LocalDate.

String date = "2018-04-16";
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd-MMM-yyyy", Locale.US);
LocalDate localDate = LocalDate.parse(date, formatter);

I tried this code with and without the Locale.US in the DateTimeFormatter object. Either way it is returning this exception instead:

java.time.format.DateTimeParseException: Text '2018-04-16' could not be parsed at index 2

Is there a way I can handle this date conversion using LocalDate or should I use SimpleDateFormat?

Your String date is in yyyy-MM-dd format but the pattern you have specified is dd-MMM-yyyy. Your date would have to be like "16-Apr-2018" for this parse to work. — Stephen P
– Stephen P, Commented Mar 16, 2023 at 18:47
Ok got the problem now. Actually, my concern is to convert the date to the 16-Apr-2018 format. I have 2018-04-16 as my input data. — Arnav Bose
– Arnav Bose, Commented Mar 16, 2023 at 18:50
If your input is yyyy-MM-dd then your DateTimeFormatter needs to use that same pattern to parse it. Then you can output (convert) the resulting LocalDate localDate into any format you want. — Stephen P
– Stephen P, Commented Mar 16, 2023 at 18:52
Yes, got it to work now. The problem was I directly tried convert the format to the desired format instead of first converting it to LocalDate and then convert. Now I have updated it and it works as you explained. — Arnav Bose
– Arnav Bose, Commented Mar 17, 2023 at 15:52
There were two votes to close this question as not reproducible or caused by a typo. It is perfectly reproducible and not caused by any typo. Instead I have closed it as a duplicate, which I consider both more correct and more helpful. — Anonymous
– Anonymous, Commented Mar 17, 2023 at 16:25

Menuka Ishan · Accepted Answer · 2023-03-16 18:51:30Z

3

In your code DateTimeFormatter.ofPattern("dd-MMM-yyyy", Locale.US); pattern dd-MMM-yyyy is for three letter months like Jun. If you want to parse strings like 2018-04-16, the pattern should be yyyy-MM-dd.

Please refer to the sample code

String date = "2018-04-16";
DateTimeFormatter inputFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
LocalDate localDate = LocalDate.parse(date, inputFormatter);

Update - For your question in the comment

After you convert String to Local date, the code below should do the trick.

DateTimeFormatter outputFormatter = DateTimeFormatter.ofPattern("dd-MMM-yyyy", Locale.US);
String outputDate = localDate.format(outputFormatter);

answered Mar 16, 2023 at 18:51

Menuka Ishan

5,5644 gold badges55 silver badges70 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Issue With Converting String to LocalDate [duplicate]

1 Answer 1

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Linked

Related