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javadatedatetimepattern-matchinglocaldate

Unable to Convert Date and Time to LocalDateTime [Java]

I'm trying to convert the string Wed July 2019 10:53 PM to LocalDateTime object using the following code:

String dateAndTimeAsStr = "Wed July 2019 10:53 PM";
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("EEE MMMM yyyy h:mm a");
LocalDateTime dateAndTimeAsLocalDateTime = LocalDateTime.parse(dateAndTimeAsStr, formatter);

Yet when I run this code I get the following error:

Exception in thread "main" java.time.format.DateTimeParseException: Text 'Wed July 2019 10:53 PM' could not be parsed: Unable to obtain LocalDateTime from TemporalAccessor: {DayOfWeek=3, MonthOfYear=7, Year=2019},ISO resolved to 22:53 of type java.time.format.Parsed

Changing yyyy to YYYY and h to hh did not yield any different results.

According to this answer on SO and the documentation it seems my pattern matches the text supplied.

What am I doing wrong?

Thanks

Solution

  • Missing day-of-month

    Your input string lacks the day of month. It says "July 2019" but not what day within July.

    The formatted date string is irreversible (as in you can format existing LocalDateTime using the formatter, but cannot parse it back). as it's missing the day value.