Hi there,
> 1. DesktopProperty: > Can You change declaration into > private final static ReferenceQueue<Object> queue = new > ReferenceQueue<Object>(); > (note that I added final and replaced HashMap by Map) and remove a > static section? This isn't exactly correct. The equivalent of a ReferenceQueue in generics notation is ReferenceQueue<?>. See: http://java.sun.com/docs/books/tutorial/java/generics/subtyping.html Correct me if I'm wrong on this. /Roman -- http://kennke.org/blog/