scala.collection.JavaConversions is evil

JavaConversionsEvil.scala

import scala.collection.JavaConversions._

case class Foo(s: String)

val map: Map[Foo, String] =
  Map(
    Foo("a") -> "a",
    Foo("b") -> "b")

val v = map.get("a") // should be a type error, actually returns null

case class Foo(s: String)

object Test {
  def f1 = {
    import scala.collection.JavaConversions._
    val map: Map[Foo, String] = Map(Foo("a") -> "a", Foo("b") -> "b")
    val v = map.get("a")  // should be a type error, actually returns null
  }
  def f2 = {
    import scala.collection.JavaAsScala._
    val map: Map[Foo, String] = Map(Foo("a") -> "a", Foo("b") -> "b")
    val v = map.get("a")  // now this is a type error
  }
  def f3 = {
    import scala.collection.ScalaAsJava._
    val map: Map[Foo, String] = Map(Foo("a") -> "a", Foo("b") -> "b")
    val v = map.get("a")
  }
}

JavaConverters the sane alternative?

By the way, thanks for providing a hit for the search "JavaConversions is evil".