reusable component

hi i am new to spring. but its amazing while using it... thnks a lot for everyone who is developing and whose are giving support to it..

here i am searching for a solution
i have a class which is having a list of strings.
and there is 3 classes which can be use it as a reusable class how i can use it ..
it has to catch the list which is passing the list of strings..

need a solution...