14.scala隐式转换

概述

隐式转换：偷偷的(隐式)对现有功能进行增强(转换)

实践

代码

package com.fun.scala

import java.io.File
import scala.io.Source

object ImplicitApp {
  def main(args: Array[String]): Unit = {

    // implicit 2 = to 等价  ：定义隐式转换函数
    // implicit def a2B(a:A):B =new B(a.)
    implicit def man2SuperMan(man: Man): SuperMan = new SuperMan(man.name)

    val man = new Man("测试")
    man.fly()

    implicit def file2RichFile(file: File) = new RichFile(file)

    val file = new File("data/wc.data")
    println(file.read())
  }
}

class Man(val name: String)


class SuperMan(val name: String) {
  def fly(): Unit = {
    println(s"$name fly ...")
  }
}

/**
 * 隐式转换 常用命名：RichXxx
 */
class RichFile(val file: File) {
  def read() = Source.fromFile(file.getPath, "utf-8").mkString
}

执行结果

结束

scala隐式转换 至此结束。