Java的List與Scala的List相互裝換

val javaList1: util.ArrayList[String] = new util.ArrayList[String]()
val scalaList: List[String] = JavaConversions.asScalaIterator(javaList1.iterator()).toList

// 接上面的scalaList
// 需設置這個引用：import scala.collection.JavaConversions
val javaList2: util.List[String] = scala.collection.JavaConversions.seqAsJavaList(scalaList)