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scalascala-java-interop

How can I convert a Java Iterable to a Scala Iterable?

Is there an easy way to convert a 

java.lang.Iterable[_]

to a

Scala.Iterable[_]

?

Solution

  • In Scala 2.8 this became much much easier, and there are two ways to achieve it. One that's sort of explicit (although it uses implicits):

    import scala.collection.JavaConverters._

val myJavaIterable = someExpr()

val myScalaIterable = myJavaIterable.asScala

    EDIT: Since I wrote this, the Scala community has arrived at a broad consensus that JavaConverters is good, and JavaConversions is bad, because of the potential for spooky-action-at-a-distance. So don't use JavaConversions at all!

    And one that's more like an implicit implicit: :)

    import scala.collection.JavaConversions._

val myJavaIterable = someExpr()

for (magicValue <- myJavaIterable) yield doStuffWith(magicValue)