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Using the AWT.Transferable, I get an argument "data: Any" which is actually of type java.util.Arrays.ArrayList. How can I cast the "data" explicitly to this type? It seems I do not have any access to the "ArrayList"-Type itself...

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  • IIRC ArrayList in Java are always untyped (i.e ArrayList<Object> or ArrayList[Any] in Scala), you have to cast each element individually. Commented Nov 18, 2010 at 12:00

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This

data match {
  case jlist: java.util.List[_] => // I got an java.util.list!
  case _ => // oops, unexpected!
}

is type-safe, which doesn't happen to be the case of asInstanceOf.

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Why do you need the class explicitly? Couldn't you use the java.util.List interface?

data.asInstanceOf[java.util.List[_]]

Note that casting is not encouraged, which is why it looks so awful in Scala!

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Ah, that did the trick. Should just have checked the interfaces of ArrayList... Thanks!

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