Scala深入浅出进阶经典 第78讲：Type与Class实战详解

package com.dt.scalaInAction.demo_078import scala.reflect.runtime.universe._/** * Type与Class实战详解 */class Sparktrait Hadoopobject Flinkclass Java {    class Scala}object Type_Advanced {    def main(args: Array[String]): Unit = {        println(typeOf[Spark])   //com.dt.scalaInAction.demo_078.Spark        println(classOf[Spark])  //class com.dt.scalaInAction.demo_078.Spark            val spark = new Spark          println(spark.getClass)  //class com.dt.scalaInAction.demo_078.Spark        println(spark.getClass == classOf[Spark]) //true                println(classOf[Hadoop]) //interface com.dt.scalaInAction.demo_078.Hadoop        println(typeOf[Hadoop])  //com.dt.scalaInAction.demo_078.Hadoop                //单例  Flink$ 说明object的背后是有具体的类        println(Flink.getClass)  //class com.dt.scalaInAction.demo_078.Flink$        //println(classOf[Flink])  //not found: type Flink               /**         * classOf getClass的区别         * getClass是表明当前类具体的子类         * classOf是表明当前具体的类型       二者没有过多的区别         */                val java1 = new Java        val java2 = new Java                val scala1 = new java1.Scala //val scala1: java1.Scala        val scala2 = new java2.Scala //val scala2: java2.Scala        println(scala1.getClass)     //class com.dt.scalaInAction.demo_078.Java$Scala        println(scala2.getClass)     //class com.dt.scalaInAction.demo_078.Java$Scala        println(typeOf[java1.Scala] == typeOf[java2.Scala])  //false        println(typeOf[java1.Scala]) //java1.Scala        println(typeOf[java2.Scala]) //java2.Scala                println(classOf[List[Int]] == classOf[List[String]]) //true        println(typeOf[List[Int]] == typeOf[List[String]])   //false        println(classOf[List[Int]])  //class scala.collection.immutable.List        println(typeOf[List[Int]])   //scala.List[Int]            }}

以上内容是从王家林老师DT大数据课程第78讲的学习笔记和个人整理。
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