Scala Actors in Scala 2.10 don't get recognized - scala

Question

I recently updated to Eclipse Juno, which also updated my Scala to 2.10. I know that Actors are deprecated now, but I'd still like to use them. The scala-actors.jar and scala-actors-migration.jar are part of my Eclipse build path, however, I get "object actors is not a member of package scala" for the imports. Any tries to re-add the scala library to the project failed didn't fix it either.
Mac OS X Lion with Eclipse Juno and Scala 2.10.
Some code (Marked the errors XXX):
import scala.actors.Actor XXX actors not found in scala
import scala.actors.Actor._ XXX actors not found in scala
class Solver() extends Actor { XXX Actor not found
def act() {
// Read file
val source = io.Source.fromFile("src/labyrinth.txt", "utf-8")
val lines = source.getLines.toList
source.close()
// Fill multidimensional array
var labyrinth = Array.ofDim[Cell](lines.length, lines.apply(0).length)
for (i <- 0 until lines.length) { // each line
for (j <- 0 until lines.apply(0).length) { // each column
labyrinth(i)(j) = new Cell(lines.apply(i).toList.apply(j)) // Fill array cell with character
}
}
// Search for start
for (k <- 0 until labyrinth(0).length) {
if (labyrinth(0)(k).character.toString() == "?") {
val start = new CheckCell(labyrinth, Array((1, k)), this).start // Kick off search
while (true) {
receive { XXX receive not found
case FoundSolution => XXX FoundSolution not found
Console.println("Pong: stop")
start ! Stop XXX Stop not found
exit()
}
}
}
}
}
}

Answer 1

Your example works fine for me (except the missing types, like Cell and CheckCell). I believe you might have one of the following:
a package scala.blah declaration in one of your source files
a source folder that contains scala as a sub-directory. Check that in Project Properties, Build Path and look for source folders. If you use the maven convention, src/main/scala should be a source directory (not just src/ or src/main/).
Both points above can shadow the standard scala package and replace it with your declaration (or directory), which obviously does not have an Actor type.