Convert java.util.Set to scala.collection.Set

Question

How can I convert a java.util.Set[String] to a scala.collection.Set with a generic type in Scala 2.8.1?

import scala.collection.JavaConversions._  var in : java.util.Set[String] = new java.util.HashSet[String]()  in.add("Oscar") in.add("Hugo")  val out : scala.collection.immutable.Set[String] = Set(in.toArray : _*) 

And this is the error message

<console>:9: error: type mismatch;   found   : Array[java.lang.Object] required: Array[_ <: String]    val out : scala.collection.immutable.Set[String] = Set(javaset.toArray : _*) 

What am I doing wrong?

Answer 1

Use JavaConverters instead

import scala.collection.JavaConverters._  val out = in.asScala  out: scala.collection.mutable.Set[String] = Set(Hugo, Oscar)