When delegating formatting of a `LocalDateTime` to javas dat kotlinlang #kotlinx-datetime

kevin.cianfarini

01/17/2023, 4:42 PM

When delegating formatting of a

LocalDateTime

to javas datetime utilities, how would I format the full date and time? Right now the value

LocalDateTime(
  year = 2023,
  monthNumber = 1,
  dayOfMonth = 17,
  hour = 10,
  minute = 30
)

Gets formatted to

Tuesday, January 17, 2023

with the following invocation:

DateTimeFormatter.ofLocalizedDate(FormatStyle.FULL)
            .withLocale(javaLocale)
            .format(dateTime.toJavaLocalDateTime())

I would expect this to format to something like

Tuesday, January 17, 2023 10:30 AM

I can’t use a static pattern because the output string needs to be locale sensitive

I think this is probably a java question actually

01/17/2023, 4:45 PM

Only a guess: use

toJavaLocalDateTime()

kevin.cianfarini

01/17/2023, 4:45 PM

Oh whoops I do, I also have a function for

LocalDate

LocalTime

DateTimeFormatter.ofLocalizedDate(FormatStyle.FULL)
            .withLocale(javaLocale)
            .format(dateTime.toJavaLocalDateTime())

Oh I did just see

DateTimeFormatter.ofLocalizedDateTime

. That’s probably what I need.

I needed to pass in separate date and time formatstyles.

DateTimeFormatter.ofLocalizedDateTime(
    FormatStyle.FULL,
    FormatStyle.SHORT
).withLocale(javaLocale).format(dateTime.toJavaLocalDateTime())

which yields

Tuesday, January 17, 2023, 10:30 AM

You cannot use the

FULL

format style on

kotlinx.LocalDateTime

for the time component because local date times don’t have timezone info embedded.