New to Java

I recently managed to finally understand linear linked list. However, now I'm supposed to figure out to make a circular linked list with a dummy node. I am completely lost. I've already written methods for regular linear linked lists like the constructors, insert, and delete, but I have no idea how to go about working with circular linked lists.

Can someone please point me in the right direction by showing a good tutorial or some good sample code? I've tried searching on Google, but I couldn't really find anything.