49 lines
952 B
Java
49 lines
952 B
Java
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//: interfaces/HorrorShow.java
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// Extending an interface with inheritance.
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interface Monster {
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void menace();
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}
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interface DangerousMonster extends Monster {
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void destroy();
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}
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interface Lethal {
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void kill();
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}
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class DragonZilla implements DangerousMonster {
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public void menace() {}
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public void destroy() {}
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}
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interface Vampire extends DangerousMonster, Lethal {
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void drinkBlood();
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}
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class VeryBadVampire implements Vampire {
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public void menace() {}
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public void destroy() {}
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public void kill() {}
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public void drinkBlood() {}
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}
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public class HorrorShow {
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static void u(Monster b) { b.menace(); }
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static void v(DangerousMonster d) {
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d.menace();
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d.destroy();
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}
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static void w(Lethal l) { l.kill(); }
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public static void main(String[] args) {
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DangerousMonster barney = new DragonZilla();
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u(barney);
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v(barney);
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Vampire vlad = new VeryBadVampire();
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u(vlad);
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v(vlad);
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w(vlad);
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}
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} ///:~
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