Class declaration does not jump to class definition but just interface

I'm using JDevelper 12.1.2 and I brought 2 bssv projects A and B into it. Both compiled fine without errors.

Inside project A java class, it references a class in project B (getName() for example). When I selected that method and right click mouse and select "Go to Declaration", it did not go to the implementation of getName() that shows how that method works.  Instead, it went to the stub that lists all the methods in project B and getName() is one of them. At the top of the class file, it said the below

//

// Oracle JDeveloper Stub Generated Source

//

The project source paths are the same for both A and B.  It used to work fine in JDeveloper 11g.  But not when I switch to JDeveloper 12.1.2.