package tests

object MultipleConstructors {

  def main(args: Array[String]) {

    // (1) use the primary constructor
    val al = new Person("Alvin", "Alexander", 20)
    println(al)

    // (2) use a secondary constructor
    val fred = new Person("Fred", "Flinstone")
    println(fred)

    // (3) use a secondary constructor
    val barney = new Person("Barney")
    println(barney)

  }

}

/**
 * The main/primary constructor is defined when you define your class.
 */
class Person(val firstName: String, val lastName: String, val age: Int) {

  /**
   * A secondary constructor.
   */
  def this(firstName: String) {
    this(firstName, "", 0);
    println("\nNo last name or age given.")
  }

  /**
   * Another secondary constructor.
   */
  def this(firstName: String, lastName: String) {
    this(firstName, lastName, 0);
    println("\nNo age given.")
  }

  override def toString: String = {
    return "%s %s, age %d".format(firstName, lastName, age)
  }

}