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 classes are similar to Java enum types.
enum class EnumExample { enum class EnumExample {
A, B, C A, B, C // Enum constants are separated with commas.
} }
fun printEnum() = println(EnumExample.A) // => A 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. 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. We cannot instantiate it but we can refer to its unique instance by its name.