Wednesday, July 7, 2010

private nested classes -- my habits

A major justification and usage of nested class is constructor access control. To appreciate, first appreciate immutables, final, singletons, protected, .... Note you can finish most projects without using these access control devices, but I tend to spend extra time adding such access controls. In complex concurrent systems, they reduce risk and add much-needed reassurance. Constructor access control is one of the controls.

Majority of my nested classes have only private constructors. I usually call them from the enclosing class.

Furthermore, all my nested classes start off as private static classes, and become protected only when necessary.

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New York (Time Square), NY, United States
http://www.linkedin.com/in/tanbin