第9章：Scalaのトレイト(trait) ref: http://qiita.com/f81@github/items/5b96af593812286eec49

file0.txt

scala> trait Job
defined trait Job

file1.txt

scala> class Job(name: String)
defined class Job

file2.txt

scala> trait Job(name: String)
<console>:1: error: traits or objects may not have parameters
       trait Job(name: String)
                ^

file3.txt

scala> trait Job { val name: String }
defined trait Job

scala> new Job { val name = "student" }
res0: Job = $anon$1@518677ee

scala> res0.name
res1: String = student

file4.txt

scala> trait Job { val name: String }
defined trait Job

scala> new { val name = "student" } with Job
res2: Job = $anon$1@701ce28a

scala> res2.name
res3: String = student

Human.scala

trait Job {
  def getName() {
    "student"
  }
}

Trait1.scala

object Trait1 {
  def main(args: Array[String]){
    val man = new Man
    man.say()
  }
}

trait Human {
  val name = "飛行帽"

  def sayName() {
    println("My name is " + name)
  }
}

class Man extends Human

Trait2.scala

object Trait2 {
  def main(args: Array[String]){
    val man = new Man("虎丸龍次", "男塾", "一号生")
    man.say()
  }
}

trait Human {
  val name: String
}

trait Job {
  val job: String
}

trait Grade {
  val grade: String
}

class Man(n: String, j: String, g: String) extends Human with Job with Grade {
  val name = n
  val job = j
  val grade = g

  def say() {
    println("名前は" + this.name + "じゃ。" + job + grade + "じゃ。")
  }
}