I have never used JLint. However, I would merely check to see what kind of settings it can manage. So far everything I have seen in eclipse is pretty good (even too much in some places).
However, whatever tool you use, the most important thing is that it is part of your development process. You should be runnign this tool every time you compile. Tools that are run once a week or once a month often find many things but people dont want to go back and fix things so they are soon neglected. This is one reason I favor the integration of such warnings into compilers.