I'm trying to convert

java.time.LocalDateTime

to

org.joda.time.DateTime

and back, so far I have created this extensions which seem to work fine:

fun java.time.LocalDateTime.toJoda(): org.joda.time.DateTime = DateTime(this.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli())
fun org.joda.time.DateTime.toJava(): java.time.LocalDateTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(this.millis), ZoneId.systemDefault())

The LocalDateTime is used by JavaFX's DatePicker, and the DateTime is used by Exposed. Any comments or suggestions?

there’s some mismatch since LocalDateTime doesn’t really correspond to DateTime - if you’re ok with the assumption of “same instant in the local timezone”, this is fine, but you should be aware it’s a bit wonky