Kotlin如何获取注解中的参数值？

annotation class Description(val value: String)

class Test {

    @field:Description(value="My field")
    var myfield: String? = null

    fun getMyFieldDescription(): String {

        return this.javaClass.getDeclaredField("myfield")
                   .getAnnotation(Description::class.java)
                   .value
    }
}

fun main(args: Array<String>) {

    var test = Test()

    println(test.getMyFieldDescription())
}

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