TreeSet in Java
What is a TreeSet?
Implements Set interface
It is more like a HashSet which contains unique elements but in a sorted ascending order
Elements are comparable by a default/custom comparator
Access & retrieval times are quite fast
Initialized with a default capacity of 16 & 0.75 load factor
TreeSet Contructors
TreeSet() : Contructs an empty tree that will be sorted based on natual order of elements
TreeSet(Collection c) : Builds a TreeSet from elements of collection c
TreeSet(Compatator c) : Constructs an empty tree that will be sorted on given comparator
TreeSet(SortedSet s) : Constructs from given SortedSet
The elements in TreeSet must be of Comparable type
String & Wrapper classes are Comparable by default
To add user-defined objects, we need to implement Comparable interface
As per Oracle, TreeSet provides log(n) cost time for basic add/remove/contains operation.
While HashSet provide constant O(1) time performance
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