1.scala数组转java的List

    val arr = ArrayBuffer("1", "2", "3")

    import scala.collection.JavaConversions.bufferAsJavaList
    val javaArr = new ProcessBuilder(arr)
    val arrList = javaArr.command()

    println(arrList)

2.java的List转scala数组(mutable.Buffer)

    import scala.collection.JavaConversions.asScalaBuffer
    import scala.collection.mutable
    // java.util.List ==> Buffer
    val scalaArr: mutable.Buffer[String] = arrList
    scalaArr.append("jack")
    println(scalaArr)