Create Me:

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// Learn Scala in one minutes
case class AboutMe(name: String = "zqh", nickName: String = "zqhxuyuan") {

  def hello() = s"hello $name."

  val family = List[String]("Wife", "Daughter", "Son")
  val livings = mutable.ListBuffer[String]("Putian", "Shanghai", "Hangzhou")

  val hobbies: java.util.List[String] = new java.util.ArrayList[String]()

  def hobby(name: String): Boolean = hobbies.add(name)

  def state(): Map[State, Any] = {
    val stating = mutable.Map[State, Any]()
    stating += Born -> livings.head
    stating += Work -> livings.last
    val pass = livings - livings.head - livings.last
    stating += Pass -> pass.toList
    stating.toMap
  }
}

Describe me:

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sealed trait State
case object Born extends State
case object Work extends State
case object Pass extends State

object AboutMe extends App {
  val me = AboutMe()

  def printMe(): Unit = {
    println(me.hello())
    println(s"Family:${me.family.mkString(",")}")
    println(s"Living:${me.livings.toList.mkString(",")}")
    me.state().foreach(println)
    me.hobby("Coding...")
    println("hobby:" + me.hobbies.asScala.mkString(","))
  }
}