Java接口之间的继承

/**
 * Created by xfyou on 2016/11/3.
 * 多接口之间的继承
 */
public class HorrorShow {
    static void u(Monster b) {
        b.menace();
    }    static void v(DangerousMonster d) {
        d.menace();
        d.destroy();
    }    public static void main(String[] args) {
        DragonZilla dz = new DragonZilla();
        u(dz);
        v(dz);
    }
}interface Monster {
    void menace();
}interface DangerousMonster extends Monster {
    void destroy();
}interface Lethal {
    void kill();
}class DragonZilla implements DangerousMonster {    @Override
    public void menace() {    }    @Override
    public void destroy() {    }
}interface Vampire extends DangerousMonster, Lethal {
    void drinkBlood();
}