day23

1. 자바 delegate Pattern

2. 코틀린 delegate pattern

틀린 곳이 있을 수 있습니다. 지적부탁드립니다.

 

 

1. 자바 delegate Pattern

package delegate2.one;

public class Main {
    public static void main(String[] args) {
        BBB x = new BBB("James");
        x.methodHello();
        x.methodBye();
    }
}

interface Greet {
    void methodHello();
    void methodBye();
}

class AAA implements Greet {
    String name = "";
    AAA(String name){
        this.name = name;
    }
    @Override
    public void methodHello() {
        System.out.println(name+", hello");
    }

    @Override
    public void methodBye() {
        System.out.println(name+", bye");
    }
}

class BBB implements Greet {
    private AAA aaa;
    BBB(String name){
        this.aaa = new AAA(name);
    }

    @Override
    public void methodHello() {
        aaa.methodHello();
    }

    @Override
    public void methodBye() {
        aaa.methodBye();
    }
}

 

2. 코틀린 delegate pattern

package delegate2

class Main {
}

fun main() {
    var bbb = BBB("james")
    bbb.hello()
    bbb.bye()
}

interface Greet{
    fun hello()
    fun bye()
}


class AAA(private val name:String) : Greet{
    override fun hello() {
        println("${name}, hello")
    }

    override fun bye() {
        println("${name}, bye")
    }
}

class BBB(private val name:String) : Greet by AAA(name){
}