gistfile1.scala

import scala.util.Marshal
import scala.io.Source
import scala.collection.immutable
import java.io._


object Example {
    class Foo(m: String) extends scala.Serializable {
        val message = m
    }


    def main(args: Array[String]) {
        val foo = new Foo("qweqwe")

        val out = new FileOutputStream("out")
        out.write(Marshal.dump(foo))
        out.close


        val in = new FileInputStream("out")
        val bytes = Stream.continually(in.read).takeWhile(-1 !=).map(_.toByte).toArray
        val bar: Foo = Marshal.load[Foo](bytes)

        println(bar.message)

    }
}

Ah: https://github.com/scala/pickling