In Scala Version 2.7.0 [1], Java generics were made visible to Scala programs. In Scala Version 2.7.2 [2], Scala generics were made visible to Java programs. However, higher-kinded type parameters are not usable from Java programs.
Links:
[1] http://www.scala-lang.org/node/43#2.7.0
[2] http://www.scala-lang.org/node/43#2.7.2