Value object sample with parsing and validation

AustralianPostcodeVO.scala

package samples

case class AustralianPostcode private (value: String) {
 require(value.matches("""\d{4}"""))
}

object AustralianPostcode {
 def parse(value: String) = new AustralianPostcode(value.trim)
}

object Main extends App {
 val p = AustralianPostcode parse "   1234"
 println(p)
}