June 2018
Intermediate to advanced
280 pages
7h 46m
English
Content preview from Design Patterns and Best Practices in Java
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Factory method pattern
The factory method pattern is an improvement upon the static factory. The factory class is made abstract and the code to instantiate specific products is moved to subclasses that implement an abstract method. This way, the factory class can be extended without being modified. The implementation of a factory method pattern is described in the following class diagram:
It's time for some example code. Let's assume we have a car factory. At the moment, we produce two car models: a small sports car and a large family car. In our software, the customer can decide whether they want a small car or a large car. To start with, ...
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