Cocos2Dx for Android--basic Eclipse IDE question

I just started recently with Cocos2DX

In my project folder, I see there is a “Classes” folder and that is where the initial HelloWorld.cpp is.

However, in Eclipse, we are working with files under the proj.android folder. The “Classes” folder is nowhere to be found.

So my question is–am I missing something? Do we not use Eclipse as the code IDE? If not, what are some things people have been using?

The Classes is there in the project as a linked resource.
Make sure you have the correct Path Variable(project properties -> Resources->linked Resources -> Path Variables) for COCOS2DX pointing to cocos2dx location.
Under “Linked Resrouces” tab, make sure that Classes folder is updated properly. Once done, refresh your project.