Why JUGs Are Good for You
For Java programmers: A great way to keep up with new Java technologies. It also gives you a chance to network with your peers, which always helps in getting a job.
For business: Instead of paying head-hunters hefty finder fees every time you need to hire a Java developer, create a home for your local JUG by letting them use one of your conference rooms one evening a month. The return on this small investment will be phenomenal: whenever you need a Java person, post your job requirements to the JUG's mailing list.
For students: JUGs give you a chance to learn what's happening in the real business world and maybe find an internship or summer job.
For headhunters: Your local JUG may give you an access to a pool of Java developers. But you should contribute too: speak periodically on the status of the Java job market in your geographical area. Such sessions are pretty popular with developers. Here's a tip for you. Headhunters can create new JUGs and breed Java programmers for themselves.