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Factory Method

Difficulty-Beginner Gang Of Four Java Creational

Also known as

Virtual Constructor


Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses.

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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

Known uses