Currently no, soon yes. Currently no classloader is needed to run Scala code. However, in order to solve binary compatibility once and for all, Scala 3 (aka D

Currently no, soon yes. Currently no classloader is needed to run Scala code. However, in order to solve binary compatibility once and for all, Scala 3 (aka Dotty) adds an extra bytecode layer on top of Java bytecode. Details at https://d-d.me/talks/scaladays2015 https://d-d.me/talks/scaladays2015