Abstract Factory Method (AFM) is a design pattern that allows for the creation of objects through a single interface. It separates the creation of an object from its instantiation, which can lead to more flexible and reusable code. The AFM pattern uses a factory method as the entry point for creating objects, allowing for easy modification and extension of the factory methods without affecting the clients that use them.

In the AFM pattern, there are several classes involved:

1. Abstract Factory: This class provides a set of abstract methods that define the interface for creating objects. It does not provide any implementation details for creating objects.

2. Concrete Factories: These classes implement the abstract factory methods and create objects based on the requirements specified by the abstract factory.

3. Clients: These classes use the abstract factory methods to create objects and perform their desired operations.

The AFM pattern has several advantages over other design patterns, such as the Singleton and Factory Method patterns. It allows for easier maintenance and extension of the factory methods, as well as better separation of concerns between the client and the factory. Additionally, it promotes flexibility and reusability of code, as objects can be created using different factories without changing the client code.抽象工厂模式