Java Programming Tutorial - 61 - Simple Polymorphic Program

public class apples {
   public static void main(String[] args){

      Animal[] thelist = new Animal[2];
      Dog d = new Dog();
      Fish f = new Fish();

      thelist[0]=d;
      thelist[1]=f;

      for(Animal x: thelist){
         x.noise();
      }
   }

}

public class Dog extends Animal {

   public void noise(){
      System.out.println("Ruff");
   }
}

public class Fish extends Animal{

   public void noise(){
      System.out.println("Glurp Slurp");
   }
}

public class Animal {

   public void noise(){
      System.out.println("Animal don´t make noise");
   }
}