I tend to use java.util.Properties (or similar classes in other languages and frameworks) wrapped in an application-specific configuration class most of the time, but I am very interested in alternatives or variations on this. Especially since things can become a bit tricky if graphical configuration dialogs or multiple views on the configuration data is involved.
Unfortunately I don't have any experience with specific libraries for Java (except with the ones I have written myself), but any pointers would be appreciated.
Update
OK. That wasn't entirely true, three is the Spring Java Configuration Project.
