Oracle Forms 11G R2 now has Java 1.7 Support !
Oracle Forms 126.96.36.199 Patch 1 Released it can be downloaded here: Oracle Forms and Reports 11g Release 2 - Contains Oracle Forms and Reports 11gR2 (188.8.131.52.0)
This release can be applied as a patch on top of 184.108.40.206 or as a full installation. Be sure to also review the product Certification Guide for the latest updates on certified configurations
If you want to see full certification information for all platforms and java client versions you can check these out.