Java - differences between TreeSet and TreeMap

TreeSet	TreeMap
1.      TreeMap is an implementation of Map interface	TreeSet is an implementation of Set interface
2.      TreeSet stores only one object.	TreeMap uses two objects called key and Value.
3.      Objects in TreeSet are sorted	Keys in TreeMap remain in sorted Order.
4.      Duplicate objects are not allowed in  TreeSet	Duplicates values are allowed in TreeMap, but keys are  unique in nature