How much of the API of an SDK does my sample application use

I have an SDK called X and a couple of sample applications written in Java and C++ that uses the APIs from the SDK.

Bigger picture : To verify how much of the classes, functions, enum variables etc defined in the SDK is used by the samp开发者_如何学Pythonle apps.

I am fooling around with doxygen to do this, Can doxygen do this and is there any other better way to do it?

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If you have the source code of the SDK you can use Cobertura to do code coverage (just run your sample app as a JUnit test)