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kotlin reflection

dependencies {
    implementation("org.jetbrains.kotlin:kotlin-reflect:1.7.20")
}

<dependencies>
  <dependency>
      <groupId>org.jetbrains.kotlin</groupId>
      <artifactId>kotlin-reflect</artifactId>
  </dependency>
</dependencies>

references

• class references

  KClass val c = MyClass::class JClass val c = MyClass::class.java KClass val c = o.javaClass.kotlin

• callable references

  KCallable // R是返回类型

• Function references

  KFunction

  fun isOdd(x: Int) = x % 2 != 0 fun isOdd(s: String) = s == “brillig” || s == “slithy” || s == “tove”

  val numbers = listOf(1, 2, 3) println(numbers.filter(::isOdd)) // refers to isOdd(x: Int)

• Propertye references

  val x = 1

  fun main() { println(::x.get()) println(::x.name) }

• Constructor references

  class Foo function(::Foo)

兼容Java反射

kotlin使用kotlin.reflect.jvm兼容java反射

import kotlin.reflect.jvm.*

class A(val p: Int)

fun main() {
    println(A::p.javaGetter) // prints "public final int A.getP()"
    println(A::p.javaField)  // prints "private final int A.p"
}

Reference

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