kotlin中接口的Lambda实现 [英] Lambda implementation of interface in kotlin

问题描述

kotlin 中的代码的等价物是什么，我尝试的似乎没有任何效果:

What would be the equivalent of that code in kotlin, nothing seems to work of what I try:

public interface AnInterface {
    void doSmth(MyClass inst, int num);
}

初始化:

AnInterface impl = (inst, num) -> {
    //...
}

推荐答案

如果 AnInterface 是 Java，您可以使用 SAM 转换:

If AnInterface is Java, you can work with SAM conversion:

val impl = AnInterface { inst, num -> 
     //...
}

否则，如果接口是 Kotlin...

Otherwise, if the interface is Kotlin...

interface AnInterface {
     fun doSmth(inst: MyClass, num: Int)
}

...你可以使用 object 语法来匿名实现它:

...you can use the object syntax for implementing it anonymously:

val impl = object : AnInterface {
    override fun doSmth(inst:, num: Int) {
        //...
    }
}

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