Iterating over Java collections in Scala

Question

I\'m writing some Scala code which uses the Apache POI API. I would like to iterate over the rows contained in the java.util.Iterator that I get from the Sheet

Answer 1

If you would like to avoid the implicits in scala.collection.JavaConversions you can use scala.collection.JavaConverters to convert explicitly.

scala> val l = new java.util.LinkedList[Int]()
l: java.util.LinkedList[Int] = []

scala> (1 to 10).foreach(l.add(_))

scala> val i = l.iterator
i: java.util.Iterator[Int] = java.util.LinkedList$ListItr@11eadcba

scala> import scala.collection.JavaConverters._
import scala.collection.JavaConverters._

scala> i.asScala.mkString
res10: String = 12345678910

Note the use of the asScala method to convert the Java Iterator to a Scala Iterator.

The JavaConverters have been available since Scala 2.8.1.