Kotlin 反射案例的數(shù)量相對(duì)較少,但Kotlin 提供了強(qiáng)大的反射庫(kù),可以讓你在運(yùn)行時(shí)檢查和操作類、對(duì)象、接口、函數(shù)等元素。以下是一些常見(jiàn)的 Kotlin 反射案例:
import kotlin.reflect.KClass
import kotlin.reflect.full.declaredFunctions
import kotlin.reflect.full.memberFunctions
import kotlin.reflect.jvm.kotlinFunction
fun main() {
val kClass: KClass<String> = String::class
println("類名: ${kClass.qualifiedName}")
println("構(gòu)造函數(shù): ${kClass.primaryConstructor?.name}")
println("屬性: ${kClass.declaredProperties.joinToString { it.name } }")
println("方法: ${kClass.memberFunctions.joinToString { it.name } }")
}
import kotlin.reflect.KFunction
import kotlin.reflect.full.callSuspendFunction
import kotlin.reflect.jvm.kotlinFunction
fun main() {
val kClass: KClass<String> = String::class
val function: KFunction<*> = kClass.memberFunctions.first { it.name == "plus" }
val instance = "Hello"
val result = function.callSuspendFunction(instance, " World")
println("調(diào)用結(jié)果: $result")
}
import kotlin.reflect.KClass
import kotlin.reflect.jvm.kotlinFunction
fun main() {
val kClass: KClass<String> = String::class
val constructor: KFunction<*> = kClass.primaryConstructor
val instance = constructor.call()
println("創(chuàng)建實(shí)例: $instance")
}
import kotlin.reflect.KClass
import kotlin.reflect.full.declaredProperties
import kotlin.reflect.jvm.kotlinProperty
fun main() {
val kClass: KClass<String> = String::class
val properties = kClass.declaredProperties
properties.forEach { property ->
if (property.name == "length") {
val getter = property.getter
val value = getter.call(null) as Int
println("原長(zhǎng)度: $value")
val setter = property.setter
setter.call(value + 1)
println("新長(zhǎng)度: ${property.getter.call(null)}")
}
}
}
這些案例展示了 Kotlin 反射的基本用法。你可以根據(jù)自己的需求進(jìn)行擴(kuò)展和深入挖掘。