java.util.Iterator to Scala list?

Question

I have the following code:

private lazy val keys: List[String] = obj.getKeys().asScala.toList

obj.getKeys returns a java.uti

Answer 1

I dislike the other answers. Hell, I dislike anything that suggests using asInstanceOf unless there's no alternative. In this case, there is. If you do this:

private lazy val keys : List[String] = obj.getKeys().asScala.collect { 
    case s: String => s 
}.toList

You turn the Iterator[_] into a Iterator[String] safely and efficiently.