// interfaces/Adventure.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.
// Multiple interfaces

interface CanFight {
 void fight();
}

interface CanSwim {
 void swim();
}

interface CanFly {
 void fly();
}

class ActionCharacter {
 public void fight() {}
}

class Hero extends ActionCharacter
 implements CanFight, CanSwim, CanFly {
 public void swim() {}
 public void fly() {}
}

public class Adventure {
 public static void t(CanFight x) { x.fight(); }
 public static void u(CanSwim x) { x.swim(); }
 public static void v(CanFly x) { x.fly(); }
 public static void w(ActionCharacter x) { x.fight(); }
 public static void main(String[] args) {
 Hero h = new Hero();
 t(h); // Treat it as a CanFight
 u(h); // Treat it as a CanSwim
 v(h); // Treat it as a CanFly
 w(h); // Treat it as an ActionCharacter
 }
}