Google's use of Java APIs in Android has been the subject of a long-running legal dispute with Oracle. Larry Ellison's team believes Google needs to pay up for exploiting Oracle IP and has pursued that line of reasoning in the courts, arguing multiple counts of patent infringement. Finding little success on that front, Oracle's case has since refocused around a contention of copyright infringement, which forms the crux of the company's argument in the April trial scheduled to resolve the dispute.