设计模式之抽象工厂模式

public interface Animal {
    public void play();
}

public class Cat implements Animal{
    @Override
    public void play() {
        System.out.println("cat");
    }
}

public class Dog implements Animal{
    @Override
    public void play() {
        System.out.println("dog");
    }
}

public interface Person{
    public void eat();
}


public class Boy implements Person{
    @Override
    public void eat() {
        System.out.println("coder");
    }
}

public class Girl implements Person{
    @Override
    public void eat() {
        System.out.println("eating.");
    }
}

public interface Producer {
    Person createPerson();
    Animal createAnimal();
}

public class PersonProducer implements Producer{
    @Override
    public Person createPerson() {
        return new Boy();
    }

    @Override
    public Animal createAnimal() {
        return new Dog();
    }
}

public class AnimalProducer implements Producer{
    @Override
    public Person createPerson() {
        return new Girl();
    }

    @Override
    public Animal createAnimal() {
        return new Cat();
    }
}

public class AbstractFactoryDemo {
    public static void main(String[] args) {
        Producer animalProducer = new AnimalProducer();
        Animal cat = animalProducer.createAnimal();
        Person girl = animalProducer.createPerson();
        cat.play();
        girl.eat();


        Producer personProducer = new PersonProducer();
        Animal dog = personProducer.createAnimal();
        Person boy = personProducer.createPerson();
        dog.play();
        boy.eat();
    }
}