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();
}