Google's reply to Oracle's amended complaint in the Java infringement suit is a barnburner and the search giant isn't going quietly. Remember that Java vs. Android code comparison line by line? Google says Oracle redacted parts to look better.
Groklaw has the Google response and the key parts.
Among them:
Google further denies that the document attached to Oracle's Amended Complaint as Exhibit J contains a true and correct copy of a class file from either Android or "Oracle America's Java." Google states further that Oracle has redacted or deleted from the materials shown in Exhibit J both expressive material and copyright headers that appear in the actual materials, which are significant elements and features of the files in question.
In other words, Google says Oracle did some creative editing on its Exhibit J to look better.
Google also says:
Google response to Oracle amended complaint
Also: Oracle says Google directly copied Java code: Here's the line-by-line comparison