It's Sun Java, it allows you to view java applets on the web. If not allowing it isn't affecting your surfing then don't allow it. You can always allow it again using your firewall settings if you decide you need it later.
WPA2 hack: How secure is your Wi-Fi?
HP’s new Surface Pro rival is designed specifically for Adobe-using designers and artists
Best kids apps for iPhone & iPad
Que faire si son iPhone ou iPad est tombé dans de l'eau ?