Kotlin中的建造者模式

fun main() {
    KotlinBuilderDemo.KotlinBuilder().setBrand("HuaWei").setCpu("i7")
}

class KotlinBuilderDemo {

    constructor()

    class KotlinBuilder {

        constructor()

        fun setBrand(brand: String):KotlinBuilder {
            println(brand)
            return this
        }

        fun setCpu(cpu: String):KotlinBuilder {
            print(cpu)
            return this
        }
    }
}