How to get sublists off a sorted list

I'm using Arrays.sort(Object[], Comparator) to help sort some
of my objects. However, I now have a need to create sublists
off of a sorted list
For example when I sort by last name ...
SubList1: Clark, Stanley
SubList1: Goodyear, Nancy
Goodyear, Elvis
Are there any Java APIs or some other techniques available to
do this?
I was thinking of using a Observer/Observable interface to notify
a change in comparison key which could then be used to create
sublists.
Thanks in advance
PJ

java.util.List has a method subList

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