抽象工厂方法模式

LandAnimal.java

public interface LandAnimal {
    public void run();
}

WaterAnimal .java

public interface WaterAnimal {
    public void swim();
}

Cat .java

public class Cat implements LandAnimal {
    @Override
    public void run() {
        Log.i("msg","cat is runing");
    }
}

Dog .java

public class Dog implements LandAnimal {
    @Override
    public void run() {
        Log.i("msg","dog is runing");
    }
}

Fish .java

public class Fish implements WaterAnimal {
    @Override
    public void swim() {
        Log.i("msg","Fish is swiming");
    }
}

Shark .java

public class Shark implements WaterAnimal {
    @Override
    public void swim() {
        Log.i("msg","Shark is swiming");
    }
}

AbstractFactory .java

public abstract class AbstractFactory {
    public abstract LandAnimal getDog();
    public abstract LandAnimal getCat();
    public abstract WaterAnimal getFish();
    public abstract WaterAnimal getShark();
}

AnimalFactory.java

public class AnimalFactory extends AbstractFactory {
    @Override
    public LandAnimal getDog() {
        return new Dog();
    }

    @Override
    public LandAnimal getCat() {
        return new Cat();
    }
    
    @Override
    public WaterAnimal getFish() {
        return new Fish();
    }
    
    @Override
    public WaterAnimal getShark() {
        return new Shark();
    }

}

使用方法如下：

AnimalFactory factory = new AnimalFactory();
LandAnimal cat = factory.getCat();
LandAnimal dog = factory.getDog();
WaterAnimal fish = factory.getFish();
WaterAnimal shark = factory.getShark();
cat.run();
dog.run();
fish.swim();
shark.swim();