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Ilkka Seppälä
2014-08-24 09:33:42 +03:00
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##Factory Method ##Factory Method
**Intent:** Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses. **Intent:** Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses.
![alt text](https://github.com/iluwatar/java-design-patterns/blob/master/factory-method/etc/factory-method.jpg "Factory Method")
**Applicability:** Use the Factory Method pattern when
* a class can't anticipate the class of objects it must create
* a class wants its subclasses to specify the objects it creates
* classes delegate responsibility to one of several helper subclasses, and you want to localize the knowledge of which helper subclass is the delegate
##Prototype ##Prototype
**Intent:** Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype. **Intent:** Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype.