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?

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)