In the Eclipse Helios Java Package Explorer, I see the Java class icons display a small question mark to the right of the ‘J’, something like [J?]. This icon is shown on each class within one package in my project, but I cannot find an explanation for this in the documentation.
At some point I expect them to disappear and be replaced with small orange rectangles. (Of which I’m also not certain of their meaning, but less worried of their connotation.) I suppose this question points to a larger one, are any of these icons defined together somewhere?
It means the class is not yet added to the repository.
If your project was checked-out (most probably a CVS project) and you added a new class file, it will have the ? icon.
For other CVS Label Decorations, check http://help.eclipse.org/help33/index.jsp?topic=/org.eclipse.platform.doc.user/reference/ref-cvs-decorations.htm