A Java User Group (JUG) is a community of users of the Java programming language. Most JUGs are geographically bound, such as the PhillyJUG (Philadelphia, USA), JUGChennai (India), JUGCNoida (India) and the DFJUG (Brazil).
Typically, members of a JUG support each other through:
Like other technology user groups, many JUGs cover costs by meeting in educational or community spaces (e.g. university lecture halls) and/or asking local companies to sponsor individual meetings.
Publishers like O'Reilly and Apress often send free books to be distributed at JUGs in exchange for the posting of public reviews of those books.