What is the equivalent of a static initialisation block in Kotlin?
I understand that Kotlin is designed to not have static things. I am looking for something with equivalent semantics - code is run once when the class is first loaded.
My specific use case is that I want to enable the DayNight feature from Android AppCompat library and the instructions say to put some code in static initialisation block of Application class.
From some point of view, companion objects in Kotlin are equivalent to static parts of Java classes. Particularly, they are initialized before class' first usage, and this lets you use their init blocks as a replacement for Java static initializers:
class C {
companion object {
init {
//here goes static initializer code
}
}
}
@voddan这并不是过分，实际上这是Kotlin网站上的建议:"当相应的类被加载(解析)时，一个伴随对象被初始化，匹配Java静态初始值设定项的语义."Semantic difference between object expressions and declarations