Answer by chepaiytrath for What are the differences between Abstract Factory and Factory design patterns?

A lot of the previous answers do not provide code comparisons between Abstract Factory and Factory Method pattern. The following is my attempt at explaining it via Java. I hope it helps someone in need of a simple explanation.

As GoF aptly says: Abstract Factory provides an interface for creating families of related or dependent objects without specifyingtheir concrete classes.

public class Client {    public static void main(String[] args) {        ZooFactory zooFactory = new HerbivoreZooFactory();        Animal animal1 = zooFactory.animal1();        Animal animal2 = zooFactory.animal2();        animal1.sound();        animal2.sound();        System.out.println();        AnimalFactory animalFactory = new CowAnimalFactory();        Animal animal = animalFactory.createAnimal();        animal.sound();    }}

public interface Animal {    public void sound();}public class Cow implements Animal {    @Override    public void sound() {        System.out.println("Cow moos");    }}public class Deer implements Animal {    @Override    public void sound() {        System.out.println("Deer grunts");    }}public class Hyena implements Animal {    @Override    public void sound() {        System.out.println("Hyena.java");    }}public class Lion implements Animal {    @Override    public void sound() {        System.out.println("Lion roars");    }}

public interface ZooFactory {    Animal animal1();    Animal animal2();}public class CarnivoreZooFactory implements ZooFactory {    @Override    public Animal animal1() {        return new Lion();    }    @Override    public Animal animal2() {        return new Hyena();    }}public class HerbivoreZooFactory implements ZooFactory {    @Override    public Animal animal1() {        return new Cow();    }    @Override    public Animal animal2() {        return new Deer();    }}

public interface AnimalFactory {    public Animal createAnimal();}public class CowAnimalFactory implements AnimalFactory {    @Override    public Animal createAnimal() {        return new Cow();    }}public class DeerAnimalFactory implements AnimalFactory {    @Override    public Animal createAnimal() {        return new Deer();    }}public class HyenaAnimalFactory implements AnimalFactory {    @Override    public Animal createAnimal() {        return new Hyena();    }}public class LionAnimalFactory implements AnimalFactory {    @Override    public Animal createAnimal() {        return new Lion();    }}