In short nothing. I have been trying for years now and I gave up. Only if the platform has an app. which generally are secondary vs the normal PC. How do I get Java for Mobile? Java capability for mobile devices is generally integrated by the device manufacturers. It is NOT available for download or installation by consumers. You need to check with your device manufacturer about availability of this technology in your device. Some PDAs (Blackberry, Palm), tablets (iPad, Android), smart phones (iPhone, Android), gaming consoles (Nintendo Wii), MP3/MP4 players (iPod), and other personal mobile devices do not support the Java plugin. See your device manufacturer's website to determine if Java is available for your specific device.