Scala之ListBuffer、ArrayBuffer、Queue及Stack介绍

来源：互联网发布：交通数据百度百科编辑：程序博客网时间：2024/04/25 12:31

1、代码

package com.yy.baseimport scala.collection.immutable.Queueobject BufferQueueAndStackTest extends App {  //ListBuffer  import scala.collection.mutable.ListBuffer   val listBuffer = new ListBuffer[Int]  listBuffer += 1  listBuffer += 2  println(listBuffer)    //ArrayBuffer  import scala.collection.mutable.ArrayBuffer  val arrayBuffer = new ArrayBuffer[Int]()  arrayBuffer += 1  arrayBuffer += 2  println(arrayBuffer)    //不可变Queue  val queue1 = Queue[Int]()  //进队：一个元素  val queue2 = queue1.enqueue(1)  //进队：一个List  val queue3 = queue2.enqueue(List(2,3,4,5,6))  println(queue3)  //拆分成两个部分  val (element,rest) = queue3.dequeue  println(element+":"+ rest)    //可变Queue  import scala.collection.mutable.Queue  val queue_ =  Queue[String]()  queue_ += "a"  queue_ ++= List("b","c")  println(queue_)  //返回第一个元素  println(queue_.dequeue())  //打印剩余元素  println(queue_)    //Stack:FIFO   import scala.collection.mutable.Stack  val stack = new Stack[Int]  stack.push(1)  stack.push(2)  stack.push(3)  println(stack.pop())  println(stack)  println(stack.pop())  println(stack)}

2、结果

ListBuffer(1, 2)ArrayBuffer(1, 2)Queue(1, 2, 3, 4, 5, 6)1:Queue(2, 3, 4, 5, 6)Queue(a, b, c)aQueue(b, c)3Stack(2, 1)2Stack(1)

0 0