When you create your application and project files, the Application Navigator should look like this:
In the Application Navigator, the project control file acts as a parent node for all the contained projects. A project might contain files representing different tiers of a multitier application, for instance, or different subsystems of a complex application. These files can reside in any directory and still be contained within a single project.
JDeveloper has the capability of recognizing many different file types, displaying each in its appropriate viewer or editor when you double-click the file in the Application Navigator.
Note that nodes in italics in the Application Navigator mean that these elements have not yet been saved.
The Application Overview window opens by default in the editor window area when you create a new application. All objects that you create within JDeveloper appear in the Application Overview file summary pages, arranged by object type. You can create new files and artifacts, and view them filtered by status and project.
You can optionally close the window, since you will not be using it to create objects for this application.
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