Scala's trait

Source: Internet
Author: User

Not particularly, but the feeling is somewhat similar to the mix-in function in Ruby, which pulls into the multiple inheritance and interface virtual classes in Java.

Package Com.hengheng.scalaclass usetrait {}trait Logger {  def log (msg:string) {    println ("log:" + msg)  }}tr AIT Consolelogger extends Logger {  override def log (msg:string) {    println (msg)  }}class Test extends Consolel Ogger {  def test () {    log ("Here is spark!")  }} Class Concretelogger extends Logger {  def concretelog {    log ("It ' s me!")}  } Object Usetrait extends App {  var logger = new Concretelogger  logger.concretelog  var test = new Test  t Est.test}


Log:it ' s me!
Here is spark!

Scala's trait

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