텔레비전 리모컨(인터페이스)

package ex07;

interface RemoteControl {
    void turnOn();

    void turnOff();

    public default void printBrand() {
        System.out.println("Remote Control 가능 TV");
    }
}

class Television implements RemoteControl {
    boolean on;

    @Override
    public void turnOn() {
        on = true;
        System.out.println("TV가 켜졌습니다.");
    }

    @Override
    public void turnOff() {
        on = false;
        System.out.println("TV가 꺼졌습니다.");
    }

    @Override
    public void printBrand() {
        System.out.println("Power Java TV입니다.");
    }

}

public class TestInterface {
    public static void main(String[] args) {
        RemoteControl obj = new Television();
        obj.turnOn();
        obj.turnOff();
        obj.printBrand();
    }
}