Is there an insertion order preserving Set that also implements List?

Question

I\'m trying to find an implementation of java.util.List and java.util.Set at the same time in Java. I want this class to allow only unique elements

Answer 1

LinkedHashSet is the answer.

Iteration ordering and uniqueness.

http://download.oracle.com/javase/6/docs/api/java/util/LinkedHashSet.html