I need to merge sort two linked lists, each has a header and the elements are all ints.

I've tried adapting some generic code, but have run into a problem - errors that are similar to this one:

split(AlgSet.LL AlgSet) in AlgSet.LLAlgSet cannot be applied to (Node<java.lang .Integer>)

I see how that is happening as I'm giving it an element next instead of an actual list. Can someone help me out? I...