Scala笔记:类

weixin_30865427

于 2019-05-27 20:07:00 发布

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文章标签： scala

原文链接：http://www.cnblogs.com/ShyPeanut/p/10932809.html

该博客为转载内容，转载自https://www.cnblogs.com/ShyPeanut/p/10932809.html ，涉及Scala相关知识。

object test21 {

class SwingType{
def wantlearned(sw:String): Unit ={
println("兔子学会"+sw)
    }
  }
object swimming{
implicit def  learningType(s:AnimalType)=new SwingType
  }
class AnimalType
object AnimalType extends App{
import swimming._
val rabbit = new AnimalType
rabbit.wantlearned("吃苹果")
  }



def main(args: Array[String]): Unit = {
val ss= SparkSession.builder().master("local[2]").appName("hello").getOrCreate()
val sc=ss.sparkContext
    ss.sparkContext.setLogLevel("ERROR")

class Person[T](var name:T)
class Student[T,S](name:T,var age: S) extends Person(name)
println(new Student[String,Int]("你好",12).name)


implicit def double2Int(x:Double)=x.toInt
val x:Int=3.5


    def foo(msg:String): Unit ={
println(msg)
    }

implicit def intToString(x : Int) = x.toString
    foo(10)





  }


}