Companion Factory

Use a companion object to create a class instance.

CompanionFactory.scala

class Ticket(val id: Int, val label: String) {
  override def toString: String = "[ticket]"
}

object Ticket {
  val Prefix = "T"

  def make(id: Int): Ticket = {
    val label = "T" + id
    new Ticket(id, label)
  }
}

object Main {
  def main(args: Array[String]): Unit = {
    val id = 
    val ticket = Ticket.make(id)

    println("id=" + ticket.id)
    println("label=" + ticket.label)
  }
}

class Ticket(val id: Int, val label: String) {
  override def toString: String = "[ticket]"
}

object Ticket {
  val Prefix = "T"

  def make(id: Int): Ticket = {
    val label = "T" + id
    new Ticket(id, label)
  }
}

object Main {
  def main(args: Array[String]): Unit = {
    val id = 
    val ticket = Ticket.make(id)

    println("id=" + ticket.id)
    println("label=" + ticket.label)
  }
}

class Ticket(val id: Int, val label: String) {
  override def toString: String = "[ticket]"
}

object Ticket {
  val Prefix = "T"

  def make(id: Int): Ticket = {
    val label = "T" + id
    new Ticket(id, label)
  }
}

object Main {
  def main(args: Array[String]): Unit = {
    val id = 
    val ticket = Ticket.make(id)

    println("id=" + ticket.id)
    println("label=" + ticket.label)
  }
}

companion-factory A companion object can hold constants and factory methods for a class with the same name.