Do you mean a MUD server written in Java? (Don't know of any, sorry.) Or a MUD host that provides the JVM so that you can run JAVA programs? You could probably negotiate with the provider, but they might resist hosting Java due to its somewhat higher memory requirements. Then again, the memory requirements really aren't that much higher, and you can prevent all the problems of runaway programs which are an issue in C/C++. Anyhow, your best bet is to find somebody you like, and then just ask them.