/**
* 父类方法、属性需要open关键字才可以被重写
*/
interface F {
fun x(): Int = 2
}
interface G {
fun x(): Int = 1
}
interface H {
fun x(): Int = 0
}
class I(var y: Int = 0): F, G, H {
override fun x(): Int {
if (y > 0) {
println("call x(): Int int I")
return y
} else if (y < -200) {
println("call x(): Int int F")
return super<F>.x()
} else if (y < -100) {
println("call x(): Int int G")
return super<G>.x()
} else {
println("call x(): Int int H")
return super<H>.x()
}
}
}
fun main(args: Array<String>) {
println(I(3).x())
println(I(-10).x())
println(I(-120).x())
println(I(-10000).x())
}
运行结果
