<pre name="code" class="java">public abstract class Animal{};
public class Cat extends Animal{};
public class Dog extends Animal{};
public abstract class Fruit{};
public class Apple extends Fruit{};
public class Orange extends Fruit{};
public abstract class Factory{
    public abstract Animal getCat();
    public abstract Animal getDog();
    public abstract Fruit getApple();
    public abstract Fruit getOrange();
}
public class AnimalFactory extends Factory{
    public Animal getCat(){
    return new Cat();
    }
    public Animal getDog(){
    return new Dog();
    }
}
public class FruitFactory extends Factory{
    public Fruit getApple(){
    return Apple();
    }
    public Fruit getOrange(){
    return Orange();
    }
}
public class TestFactory{
    public static void main(){
    Factory af = new AnimalFactory();
    Animal cat = af.getCat();
    Animal dog = af.getDog();
    Factory ff = new FruitFactory();
    Fruit apple = ff.getApple();
    ...
    }
}