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Added real world example for Factory Method.

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Ilkka Seppälä 2015-02-25 15:47:24 +02:00
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* 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
**Real world examples:**
* [java.util.Calendar#getInstance()](http://docs.oracle.com/javase/6/docs/api/java/util/Calendar.html#getInstance%28%29)
## <a name="prototype">Prototype</a> [&#8593;](#list-of-design-patterns)
**Intent:** Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype.