Mega Code Archive
Extending an interface with inheritance
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// : c08:HorrorShow.java
// Extending an interface with inheritance.
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
interface Monster {
void menace();
}
interface DangerousMonster extends Monster {
void destroy();
}
interface Lethal {
void kill();
}
class DragonZilla implements DangerousMonster {
public void menace() {
}
public void destroy() {
}
}
interface Vampire extends DangerousMonster, Lethal {
void drinkBlood();
}
class VeryBadVampire implements Vampire {
public void menace() {
}
public void destroy() {
}
public void kill() {
}
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);
}
} ///:~
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