Scala学习之五隐式转换implicit

概述

简单说，隐式转换就是：当Scala编译器进行类型匹配时，如果找不到合适的候选，那么隐式转化提供了另外一种途径来告诉编译器如何将当前的类型转换成预期类型。

第一种

class Person(val name:String)
object Person{
implicit def Person2(p :Person)=new per(p.name)
}

class per(val name:String){
def makeMiracles =println("wow wow wow ...")
}

object test {
def main(args: Array[String]): Unit = {
val p=new Person("Scala")
p.makeMiracles
}

}

第二种

class Person(val name:String)
object AAA {
implicit def Person2(p :Person)=new per(p.name)
}
class per(val name:String){
def makeMiracles =println("wow wow wow ...")
}

object test {
def main(args: Array[String]): Unit = {
import cn.yzx.spark.scala.helloworld.AAA._
val p=new Person("Scala")
p.makeMiracles
}

}

第三种

object test {
def main(args: Array[String]): Unit = {
implicit val content="GG"
talk("Scala")("mm")
talk("Scala")
}
def talk(name:String)(implicit content:String)=println(name+" "+content)
}