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enum class Color { RED, GREEN, BLUE } fun main() { println(Color.GREEN) // GREEN } Or give enum a value: enum class Color { RED(0xFF0000), GREEN(0x00F 阅读全文
posted @ 2020-10-12 15:04
Zhentiw
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Singleton Object need to be defined as global variable: object Cache { val name= "Cache" fun retrieveDate(): Int { return 0 } } fun main() { println(C 阅读全文
posted @ 2020-10-12 14:58
Zhentiw
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If we want to use Class to represent a piece of data such as Object, we can use Data class instead of normal class. Difference: Data class has better 阅读全文
posted @ 2020-10-12 14:56
Zhentiw
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interface Lendable { fun borrow() } // The properties title, genre, and publicationYear can be included in the parent class because both books and DVD 阅读全文
posted @ 2020-10-12 14:53
Zhentiw
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import java.util.* /** * You can edit, run, and share this code. * play.kotlinlang.org */ abstract class Course(val topic: String, val price: Double) 阅读全文
posted @ 2020-10-12 03:39
Zhentiw
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import java.util.* /** * You can edit, run, and share this code. * play.kotlinlang.org */ interface Driveable { fun drive() } interface Buildable { va 阅读全文
posted @ 2020-10-12 03:24
Zhentiw
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