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design patterns

 
Greenhorn
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What is the difference between factory design pattern and abstract factory design pattern, please elaborate with examples too.

thanks
 
Ranch Hand
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By using factory pattern, you are using a subclass to do object creation. Clients only see the superclass and no need to worry what is really created at run time. In abstract pattern, the abstract type creats a family of products. Compared to factory pattern, the abstract factory pattern groups a set of realted products together. You can take it this way, abstract factory pattern is bigger than factory pattern. You can often see methods of an abstract factory are implemented as factory methods.
 
(instanceof Sidekick)
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Scroll on down to the OO, UML, Patterns, etc. forum. We had a thread on this not long ago. See ya there!
 
author and iconoclast
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And indeed, that's the forum in which this question belongs; I will move it there for you.
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