클래스 상속

 

상속 관계의 클래스를 만들어보자

 

 

class Animal

open class Animal(val name:String)

interface Pet

interface Pet{
    var category:String
    val msgTags:String
        get() = "I love my pet!"

    var species:String
    fun feeding()
    fun patting(){
        println("Keep patting")
    }
}

class Cat

class Cat(name: String, override var category: String) : Pet, Animal(name){
    override var species: String = "cat"

    override fun feeding() {
        println("Feeding cat")
        println("cat name:$name")
    }
}

class Dog

class Dog(name: String, override var category: String) : Pet, Animal(name){
    override var species: String = "dog"

    override fun feeding() {
        println("Feeding dog")
        println("dog name:$name")
    }
}

class Master

class Master{
//    fun playWithPet(dog:Dog){
//    }
//    fun playWithPet(cat:Cat){
//    }
    fun playWithPet(pet:Pet){
        println(pet.species)
        pet.feeding()
    }
}

함수호출부

fun main(args: Array<String>) {

    val master = Master()
    val dog = Dog("뭉뭉이", "Small")
    master.playWithPet(dog)

    val cat = Cat("영춘이", "Big")
    master.playWithPet(cat)

}