adventure.java

这是《Java案例精粹150例（上册）》一书配套的源代码。

//: Adventure.java
package javabasic;

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); // 把h当作CanFight
    u(h); // 把h当作CanSwim
    v(h); // 把h当作CanFly
    w(h); // 把h当作ActionCharacter
  }
}