Java Utility Class Best Practices. A class works in unix but doesn't on windows (or vice versa) invalid filenames due to double or missing path separators; Utility class is usually declared final, so it cannot be subclassed.
As an example consider apache stringutils, collectionutils or java.lang.math. So i would say it depends on the scenario. The most important piece of advice you can ever get for java class naming is to understand and apply the single responsibility principle.