每日代码系列（19）

interface Animal {
  public abstract void cry();
  public abstract String getAnimalName();
}
class Simulator {
  public void playSound(Animal an) {
    an.cry();
    an.getAnimalName();
  }
}
class Dog implements Animal {
  public void cry() {
    System.out.println("汪汪...");
  }
  public String getAnimalName() {
    return "Dog";
  }
}
class Cat implements Animal {
  public void cry() {
    System.out.println("喵喵...");
  }
  public String getAnimalName() {
    return "Cat";
  }
}
public class Test6_4 {
  public static void main(String[] args) {
    Simulator sim=new Simulator();
    sim.playSound(new Dog());
    sim.playSound(new Cat());
  }
}

上午Java考试，这是最后一道大题。这能难倒我？