By Alvin Alexander. Last updated: June 6, 2016
You can use Java Collections in a Scala app by using this import statement:
import scala.collection.JavaConversions._
I just tested the following Scala application that gets a Java collection from the MongoDB Java driver, and I can confirm that this works:
import com.mongodb.Mongo; import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.BasicDBObject; import com.mongodb.DBObject; import com.mongodb.DBCursor; import scala.collection.JavaConversions._ object TestDatabaseConnection { def main(args: Array[String]) { val m = new Mongo() // connect to the test database val db = m.getDB("test") // get a Java Set here val collections = db.getCollectionNames // use it like a Scala collection here for (s <- collections) { println(s) } // print all the DBObject's in the current collection val collection = db.getCollection("foo") val cursor = collection.find while (cursor.hasNext) { val dbObject = cursor.next println(dbObject) } } }