horrorshow.java

来自「think in java TIJ-3rd-edition-code.zip」· Java 代码 · 共 42 行

//: c08:HorrorShow.java
// Extending an interface with inheritance.
import com.bruceeckel.simpletest.*;

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();
}

public class HorrorShow {
  static void u(Monster b) { b.menace(); }
  static void v(DangerousMonster d) {
    d.menace();
    d.destroy();
  }
  public static void main(String[] args) {
    SimpleTest monitor =
      new SimpleTest("HorrorShow");
    DragonZilla if2 = new DragonZilla();
    u(if2);
    v(if2);
    monitor.expect(new String[] {
    });
  }
} ///:~