How to avoid large if-statements and instanceof

Question

Animal

public abstract class Animal {
 String name;

 public Animal(String name) {
  this.name = name;
 }

}

Lion<

Answer 1

Animal

public abstract class Animal {
 String name;

 public Animal(String name) {
  this.name = name;
 }

 public abstract void exhibitNaturalBehaviour();

}

Lion

public class Lion extends Animal {

 public Lion(String name) {
  super(name);
 }

 public void exhibitNaturalBehaviour() {
  System.out.println("Roar");
 }
}

Deer

public class Deer extends Animal {

 public Deer(String name) {
  super(name);
 }

 public void exhibitNaturalBehaviour() {
  System.out.println("Running...");
 }

}

TestAnimals

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

  Animal[] animalArr = {new Lion("Geo"), new Deer("D1"), new Deer("D2")};
  for (Animal a : animalArr) {
     a.exhibitNaturalBehaviour();    
  }

 }
}