How to add ADF source code in JDeveloper 12c ?

Problem

I want to have ADF source code available in my project.

Solution

• Open service request ticket at My Oracle Support and ask to provide you a source code for ADF. Oracle staff will provide you a security code and a link to download a zip file.
•  Open JDeveloper, select Tools -> Manage Libraries… 

• • Click Libraries tab
  • Select folder User
  • Click New
  • Select Source Path on the right pane then click Add Entry…
  • Point to zip file received from Oracle

• Add defined library to particular project
  • Right click on project folder and select Properties
  • Select Libraries and Classpath on the left pane
  • Click Add Library on the right pane
  • Point to previously defined ADF source code library which should be available in User folder

• You should be able to access ADF source classes now!