Easy way to convert Java 8's LocalDateTime to Joda's LocalDateTime

Question

Is there any easy way to convert Java 8's LocalDateTime to Joda's LocalDateTime?

One of the ways is to convert it to String and then create Joda's LocalDateTime from that String.

Answer 1

Convert through epoch millis (essentially a java.util.Date()):

java.time.LocalDateTime java8LocalDateTime = java.time.LocalDateTime.now();  // Separate steps, showing intermediate types java.time.ZonedDateTime java8ZonedDateTime = java8LocalDateTime.atZone(ZoneId.systemDefault()); java.time.Instant java8Instant = java8ZonedDateTime.toInstant(); long millis = java8Instant.toEpochMilli(); org.joda.time.LocalDateTime jodaLocalDateTime = new org.joda.time.LocalDateTime(millis);  // Chained org.joda.time.LocalDateTime jodaLocalDateTime =         new org.joda.time.LocalDateTime(             java8LocalDateTime.atZone(ZoneId.systemDefault())                               .toInstant()                               .toEpochMilli()         );  // One-liner org.joda.time.LocalDateTime jodaLocalDateTime = new org.joda.time.LocalDateTime(java8LocalDateTime.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli()); 

Single line, but long, so "easy"? It's all relative.