The Ps3hax website tells us today that the developer Zexocao happened to run Java homebrew on Ps4. He proves it on video to silence the doubters. This is not a hack but it's a start, remember that the ps3 had also started her through this stage before seeing a jailbreak happen. https://www.youtube.com/watch?v=8ucnqBNmqU8 https://www.youtube.com/watch?v=_cqQ2hFiKpo it good avancement