set inter is used to represent unique elements where as in 
list interface elements need not be unique ArrayList, 
Vector and LinkeList implememts list interface.Hashset and 
LinkedHastSet implements set interface

Set does not permit duplicate elements, List does. Also, Set
does not guarantee any iteration order, whereas List does.

set:
1)set interface extended from collection interface
2)set does not allow duplicated values
3)set interface contain concreated classes(TreeSet,HashSet)
4)set interface retrive the data only forward Direction
only( only Iterator is their)
5)in set object add an element at end only
6)set interface contain one sub interface(sorted set)

List
1)List interface extended from collection interface.
2)List allows duplicated values
3)List interface contain concreated
classes(ArrayList,LinkedList)
4)in List object add an element at specific(dynamic)
insertion is possible
5)List interface retrive the data  forward Direction and
backword directions(ListIterator is their)
6)List interface  does not contain ony sub interface