1.  Set, HashSet and TreeSet   
2.  Things you can do with Sets   
3.  Set operations: union, intersection, difference, symmetric difference, is subset, is superset   
4.  Set implementation that use == instead of equals()   
5.  Set that compares object by identity rather than equality   
6.  Set union and intersection   
7.  Set with values iterated in insertion order.   
8.  Putting your own type in a Set   
9.  Use set   

10.  Another Set demo   
11.  Set subtraction   
12.  Working with HashSet and TreeSet   
13.  TreeSet Demo   
14.  Show the union and intersection of two sets   
15.  Demonstrate the Set interface   
16.  Array Set extends AbstractSet   
17.  Sync Test   
18.  Set Copy   
19.  Set and TreeSet   
20.  Tail   
21.  What you can do with a TreeSet   
22.  Remove all elements from a set   
23.  Copy all the elements from set2 to set1 (set1 += set2), set1 becomes the union of set1 and set2   
24.  Remove all the elements in set1 from set2 (set1 = set2), set1 becomes the asymmetric difference of set1 and set2   
25.  Get the intersection of set1 and set2, set1 becomes the intersection of set1 and set2   
26.  Extend AbstractSet to Create Simple Set   
27.  Int Set   
28.  One Item Set   
29.  Small sets whose elements are known to be unique by construction   
30.  List Set implements Set   
31.  Converts a char array to a Set   
32.  Converts a string to a Set   
33.  Implements the Set interface, backed by a ConcurrentHashMap instance   
34.  An IdentitySet that uses referenceequality instead of objectequality   
35.  An implementation of the java.util.Stack based on an ArrayList instead of a Vector, so it is not synchronized to protect against multithreaded access.   
36.  A thin wrapper around a List transforming it into a modifiable Set.   
37.  A threadsafe Set that manages canonical objects   
38.  This program uses a set to print all unique words in System.in   
39.  Indexed Set   
40.  An ObjectToSet provides a java.util.Map from arbitrary objects to objects of class java.util.Set.   
41.  Sorted Multi Set   
42.  Fixed Size Sorted Set   
43.  Set operations   
44.  A NumberedSet is a generic container of Objects where each element is identified by an integer id.   
45.  Set which counts the number of times a values are added to it.   
46.  Set which counts the number of times a values are added to it and assigns them a unique positive index.   
47.  Indexed Set   
48.  A set acts like array.   
49.  Implements a Bloom filter. Which, as you may not know, is a spaceefficient structure for storing a set.   
50.  Implementation of disjointset data structure   
51.  Call it an unordered list or a multiset, this collection is defined by oxymorons   