Runescape runs via web browser and that's the only thing I'm aware of that uses Java, I'm terribly unfamiliar with Java so hopefully that somewhat addresses your answer. Java is installed as a ".exe" file though. EDIT: When I download the "rsbot.jar" and click it, "C:\Users\Roman\Downloads\RSBt-4040.jar" appears in a separate box along with "Application not found" underneath in the same box. Java doesn't seem to even interact with the file.