Java Factory Pattern Use Cases

The Java Factory pattern is suitable for the following scenarios:

1. When multiple classes implement the same interface or inherit from the same parent class, and there is a need to dynamically create objects of these classes at runtime, the factory pattern can be used. For example, a car manufacturer may have multiple models of cars, and the factory pattern can be used to create different car objects based on the different models.
2. When the process of creating an object is complex and requires a series of initialization steps, the factory pattern can be used. For example, a graphic editor may have different types of graphic objects, each requiring different initialization steps. By using the factory pattern, the initialization steps can be encapsulated in a factory class, simplifying the client’s code.
3. When the client only needs to know the interface of an object, without needing to know the specific implementation class, the factory pattern can be used. The factory pattern decouples the creation of objects from the client code, allowing the client to simply retrieve objects through the factory class.
4. When it is necessary to determine which specific object to create based on a configuration file or other external factors, the factory pattern can be used. By using the factory pattern, the process of creating objects is abstracted from the client code, making it possible to change the created objects by simply modifying the configuration file or other external factors.