import scala.collection.mutable.ArrayBuffer var ary=Array(1,2,3) println(ary.mkString) println(ary(1))//取出第一个元素 println(ary.toBuffer)//转化成ArrayBuffer var aryb=ArrayBuffer(1,2,3) println(aryb.toString) println(aryb.mkString) println(aryb(1))//取出第一个元素 println(aryb.toArray)//转化成ArrayBuffer