public class Animal { public void sound() { System.out.println(" "); }}public static void main(String[] args) { Animal[] animals = {new Cat(), new Cow(), new Dog(), new Duck()}; for (Animal animal : animals) { soundAnimal(animal); }}private static void soundAnimal(Animal animal) { System.out.println("==== 사운드 호출 ===="); animal.sound(); System.out.println("==..
