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Kotlin

Kotlin

enum

enum class Direction {
    NORTH, SOUTH, WEST, EAST
}

enum- . .

enum-,

enum class Color(val rgb: Int) {
        RED(0xFF0000),
        GREEN(0x00FF00),
        BLUE(0x0000FF)
}

Enum-

enum class ProtocolState {
    WAITING {
        override fun signal() = TALKING
    },

    TALKING {
        override fun signal() = WAITING
    };

    abstract fun signal(): ProtocolState
}

, . , enum- - , , Java.

enum-

Java, enum- Kotlin enum- . :

EnumClass.valueOf(value: String): EnumClass
EnumClass.values(): Array<EnumClass>

valueOf() IllegalArgumentException, , .

enum- , enum-:

val name: String
val ordinal: Int

, enum- Comparable. .

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