User, you can check this sample Andrejus Baranovskis Blog: Improving ADF UI Table CRUD Functionality with Auto Focus whihc has a solution which work for 11g. However, in 12c the keyboard and focus stuff has been rewritten due to WAG 2.0 (accessibility stuff) standards and I'm not sur this solution still works (see Set Focus on CreateINsert row in ADF Table ).
Try it out for yourself, please!
I have tried the above scenario but its not working in 12c. could please tell me the any different approach.