如何使用从scala 2.11收集的java8流？

import java.util.stream._

val numbers = List(1, 2, 3, 4, 5)
val evenNumbers = numbers.stream().filter(n => n % 2 == 0).collect(Collectors.toList())

val numbers = List(1, 2, 3, 4, 5)
val squaredNumbers = numbers.stream().map(n => n * n).collect(Collectors.toList())

val numbers = List(5, 3, 1, 4, 2)
val sortedNumbers = numbers.stream().sorted().collect(Collectors.toList())

val numbers = List(1, 2, 3, 4, 5)
val sum = numbers.stream().reduce(0, (a, b) => a + b)

import scala.collection.JavaConverters._
val numbers = List(1, 2, 3, 4, 5)
val javaStream = numbers.toStream.asJava
val scalaList = javaStream.asScala.toList