迭代器

//it.next()返回迭代器的下一个元素
//it.hasNext()检测集合中是否还有元素

object iterator_test {
    def main(args:Array[String]): Unit ={
//      val  it=Iterator("baidu","google","taobao","jindong")
//      //迭代器的长度
////      println("size:"+it.size) //4
////      println("length:"+it.length) //0
//      while(it.hasNext){
//        println(it.next())
//      }
      val ita=Iterator(20,40,30,70,50)
//      println("max:"+ita.max)
      println("size:"+ita.size) //5
      println("length:"+ita.length) //0
    }
}