When I first learned about OOP, I thought that one of the challenging decisions in the design was to determine virtual functions (I started OOP using c++). However, this became not a big issue as I got more mature in OOD.
Java differs. In Java, all methods are virtual, unless explicitly declared as final.
I was thinking, which approach is better?
My initial thoughts are that Java's approach is better and easier. Maybe it's not good to apply in C++ because virtual tables are used and calling virtual functions cost more than non-virtual. (not sure about the case in Java).
I don't have a complete image yet. Thoughts and comments are welcome.
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