JavaOne

[1] For many years, the conference was hosted by Sun executive and Java evangelist John Gage.

During the 2008 conference, seventy Moscone Center staff members and three attendees were sickened by an outbreak of norovirus.

In some years, one block of Mason was closed and covered with a tent, which formed part of the conference venue.

In March 2022, Oracle announced that JavaOne will return in October 2022,[4] reclaiming the position the now defunct CodeOne conference once occupied.

Several of the conferences highlighted a hardware device, typically made available to attendees before it is sold to the general public, or at a steep discount: From 2007 to 2009, an associated one-day event, CommunityOne, was held, for the broader free and open-source developer community.