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Welcome to Core J2EE Patterns!
Factory Method pattern should be used when: - a framework delegate the creation of objects derived from a common superclass to the factory - the base factory class does not know what concrete classes will be required to create - delegates to its subclasses the creation of concrete objects - factory subclasses subclasses are aware of the concrete classes that must be instantiated Factory method pattern, compared to Factory pattern replace the factory with an abstract class and a set of concrete factories subclasses. The subclasses are responsible for creating concrete product objects; for factory method is possible adding new product classes without changing the abstract factory. The same result can be achieved for simplified factory pattern if reflection is used.
