Java DNS logger

Hi,
I've written a small utility that in particular can help debugging DNS related problems with RMI applications.
It logs all DNS hostname and address resolutions and will show what hostnames were resolved and what hostnames couldn't be found.
This way one can see if the application attempts to connect to a host that is unavailable on its network.
It can be used with any java application (using a command line argument).
More details at http://www.genady.net/dns/ . Java 5.0+ required.
Comments are welcome,
Genady

Okay, I understand. However, I do not fully grasp why there's no such thing as a Java Domain Name Server. I mean, technically it's a server socket at port #57 answering to requests in a way defined by protocol (which should be in some RFC document).
Maybe I'm overlooking something, but to me it doesn't seem impossible or unwise to write a Java DNS server (shall we say: a "100% Pure Java DNS"). Or are there already numerous free DNS servers out there that I've apparently missed?

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