// interfaces/HorrorShow.java

// (c)2017 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

// Extending an interface with inheritance

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();

}

class VeryBadVampire implements Vampire {

@Override

public void menace() {}

@Override

public void destroy() {}

@Override

public void kill() {}

@Override

public void drinkBlood() {}

}

public class HorrorShow {

static void u(Monster b) { b.menace(); }

static void v(DangerousMonster d) {

d.menace();

d.destroy();

}

static void w(Lethal l) { l.kill(); }

public static void main(String[] args) {

DangerousMonster barney = new DragonZilla();

u(barney);

v(barney);

Vampire vlad = new VeryBadVampire();

u(vlad);

v(vlad);

w(vlad);

}

}