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    }}

来源：https://www.cnblogs.com/hapyygril/p/11544234.html