scala進階25-獲取型別（類、物件、object、trait)
阿新 • • 發佈：2018-12-25
import scala.reflect.runtime.universe._ class Spark trait Hadoop object Flink class Java { class Scala } /** * 例項獲取類用getClass * 類獲取用classOf */ object Type_Advanced { def main(args: Array[String]): Unit = { // println(typeOf[Spark]) //報錯 println(classOf[Spark]) val spark = new Spark println(spark.getClass) println(classOf[Hadoop]) println(Flink.getClass) //class Flink$ 說明object是有對應的類的 // println(classOf[Flink]) //報錯,找不到類, val java1 = new Java val java2 = new Java val scala1 = new java1.Scala val scala2 = new java2.Scala println(java1.getClass) println(java2.getClass) // println(typeOf[java1.Scala]) //報錯,找不到類 // println(typeOf[java2.Scala]) println(classOf[List[Int]]) } }