ThreadLocal.scala

class ThreadLocal[T](init: => T) extends java.lang.ThreadLocal[T] with Function0[T] {
  override def initialValue:T = init
  def apply = get
  def withValue[S](thunk:(T => S)):S = thunk(get)
}

ThreadLocalExample.scala

val tl = new ThreadLocal(System.currentTimeMillis)

// these three are all equivalent, and depends on your taste
tl.withValue { v => System.out.println(v) }
System.out.println(tl.get)
System.out.println(tl())