What is the performance of different Set implementations in Java?

What is the performance of different Set implementations in Java?

In Java, the performance of Set implementations varies. For example, HashSet offers O(1) time complexity for add, remove, and contains operations, while TreeSet provides O(log n) for these operations due to its underlying red-black tree structure.

What about LinkedHashSet? How does it compare?

LinkedHashSet maintains insertion order and has O(1) time complexity for add, remove, and contains operations, similar to HashSet, but with a slight overhead due to maintaining the order.

When should I use TreeSet instead of HashSet?

Use TreeSet when you need sorted order or range queries, as it keeps elements in natural order or according to a comparator, unlike HashSet.

Are there any performance trade-offs I should be aware of?

Yes, while HashSet is faster for basic operations, TreeSet uses more memory and is slower for operations that require sorting. Choose based on your specific needs.