treeset, hashset difference

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TreeSet and HashSet are both implementations of the Set interface in Java, but they have some key differences.

TreeSet is a sorted set that maintains elements in ascending order, while HashSet does not guarantee any specific order.
TreeSet uses a Red-Black tree data structure for storage, which allows for efficient retrieval of elements in sorted order.
HashSet uses a hash table for storage, which provides constant-time performance for basic operations like add, remove, and contains.
TreeSet is slower than HashSet for most operations due to the sorting overhead, but it is useful when you need to maintain elements in a specific order.
HashSet allows for null elements, while TreeSet does not.

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