Kotlin enum

This commit is contained in:
ashraf-patel 2019-08-05 14:31:01 +05:30
parent 592901be9c
commit 99bab9d9e9

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@ -350,11 +350,22 @@ fun helloWorld(val name : String) {
// Enum classes are similar to Java enum types.
enum class EnumExample {
A, B, C
A, B, C // Enum constants are separated with commas.
}
fun printEnum() = println(EnumExample.A) // => A
// Since each enum is an instance of the enum class, they can be initialized as:
enum class EnumExample(val value: Int) {
A(value = 1),
B(value = 2),
C(value = 3)
}
fun printProperty() = println(EnumExample.A.value) // => 1
// Every enum has properties to obtain its name and ordinal(position) in the enum class declaration:
fun printName() = println(EnumExample.A.name) // => A
fun printPosition() = println(EnumExample.A.ordinal) // => 0
/*
The "object" keyword can be used to create singleton objects.
We cannot instantiate it but we can refer to its unique instance by its name.