• • It is the child interface of set.
• • If we want to represent a group of individual object according to some sorting order and duplicates are not allow then we should go for SortedSet.

Methods specified in SortedSet

Basically, there are 6 methods available in SortedSet which are as follows:

1. first(): it retrieves the first object from a given set of objects.
   For example,

   100
   102
   103
   104
   105
   107

   First (); //100

2. last (); //107
   retrieves the last object;
3. headset(Object o)
   retrieves one or more than one objects which are less than the specified object.
   e.g.

   headset(107) //[100,102,103,104,105]

4. tailset(Object o)
   Retrieves one more than one objects which are greater than or equal to specified objects.
   e.g.

   tailset(103); //[103,104,105,107]

5. subset(Object o1,objecto2)
   Retrieves one or more than one objects which are greater than or equal to Object o1 but less than Objecto2.
6. comparator() :
   returns comparator objects which describe underlying sorting technique.