ListBuffer、ArrayBuffer、Queue、Stack操作代码实战

ListBuffer、ArrayBuffer、Queue、Stack操作代码实战 
  import scala.collection.mutable.ListBuffer
    val listBuffer = new ListBuffer[Int]
    listBuffer += 1
    listBuffer += 2
    println(listBuffer)
 运行情况：
ListBuffer(1, 2)
   
   
    import scala.collection.mutable.ArrayBuffer
    val arrayBuffer = new ArrayBuffer[Int]()
    arrayBuffer += 1
    arrayBuffer += 2
    println(arrayBuffer)
 运行情况：
ArrayBuffer(1, 2)

    val empty = Queue[Int]()
    val queue1 = empty.enqueue(1)
    val queue2 = queue1.enqueue(List(2,3,4,5))
    println(queue2)
    val (element, left) = queue2.dequeue
    println(element + " : " + left)
  运行情况：
Queue(1, 2, 3, 4, 5)
1 : Queue(2, 3, 4, 5)

 

    import scala.collection.mutable.Queue
    val