About Question enthuware.ocpjp.v8.2.1823 :

[Sergey]

If we cannot override the final method (mA), how is it possible to call it from TestClass?

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o1.mA(); //4

[admin]

Why do you think final has anything to do with access?

[Sergey]

We instantiate object of Encyclopedia:

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Book o1 = new Encyclopedia (); //3

After we want to 'execute' method:

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o1.mA(); //4

But since type of reference is Book, we need that class Book has mA method. It really has it. But we must `execute` this method from Encyclopedia object, and since this method (in Encyclopedia object) is not compile, how could we `execute` it?

[admin]

Sorry but I am not sure what you mean by "and since this method (in Encyclopedia object) is not compile". Can you be a bit more clear about what you mean by this so that I can address your confusion?

Remember that final just means that a subclass cannot override it. It doesn't mean the subclass cannot access it or can not inherit it. This is OCAJP stuff

[Sergey]

I just try to understand if the line //2 will cause compilation to fail, then how could we run method o1.mA()? Since this method is fail to compile. By this logic the line //4 should not compile too?
I have passed OCA (81%) ))

[Sergey]

In other words, how could we run something if this "someting" is not compiled?

[admin]

In other words, how could we run something if this "someting" is not compiled?

Line marked //2 doesn't compile because it is trying to override a final method. There is no problem with line marked //4 because Encylopedia inherits method mA() from Book.

[Sergey]

Thanks. Now it is clear. It (method mA()) cannot be overridden but it inherited.