There are two Java developers at our office, a colleague and myself.
I use Eclipse and Maven and the other guy uses VI (not even syntax highlighting) and Ant (no Ivy). The irony is that the other guy is once hired as our main "Java expert", while I'm a generalist who happens to be a Java expert as well. I'm slowly convincing my team and superiors that using VI and Ant is not really efficient, nor is putting all of your libraries in SVN and keeping around old libraries on your classpath when you upgrade to a newer version of the same library.
Our manager recently visited an old friend who has set up a medium-sized (70 people) company with mostly (Java) developers. To his surprise, most of them used Eclipse and Maven (and lots of other useful tools)! I've often told him "well, I don't use them because I want to be different, I use them because every serious programmer is using them (or some other tools based on the same ideas)!" Of course it's hard for the non-technical guys at our office to understand what we're talking about, so I'm glad he got to see an actual serious company using those tools.