That was rather markedly different, since it was a copyright suit, not a patent suit. AT&T never claimed that they had patents that forbade using BSD; they simply claimed that BSD could not possibly have been written without violating AT&T's Unix copyrights.

In this case, as far as I'm aware, Oracle is not claiming that Google misappropriated any Java source code, but rather that they violated numerous patents that cover JVM-like technologies. This would be akin to AT&T saying that Linux was illegal because it violated patents it held on Unix.