Hands-On Object-Oriented Programming with Kotlin

The enum class with a constructor

Each member of the enum class contains an integer value that starts from 0, but Kotlin also allows us to assign a value of our own choice using a constructor:

enum class Week(val value: Int) {    MONDAY(2 ), TUESDAY(4), WEDNESDAY(6), THURSDAY(8), FRIDAY(10), SATURDAY(12), SUNDAY(14)}

The Week enum class has a constructor with one integer property. Each member in the enum class is bound to provide an initial value:

fun main(args: Array<String>) {     val week = Week.valueOf("TUESDAY")     println("Item type: " + week)     println("Name: " + week.name)     println("Value: " + week.value)}

Verify the output by assigning a different values of the week enum.

The output of the preceding example is as follows:

Item type: TUESDAY, ...