What are the differences between TreeSet and HashSet in Java?

What are the differences between TreeSet and HashSet in Java?

TreeSet and HashSet are both implementations of the Set interface in Java, but they have key differences. TreeSet is sorted and maintains order, while HashSet does not guarantee any order.

Can you explain how the performance differs between the two?

Sure! HashSet offers constant time performance for basic operations like add, remove, and contains, while TreeSet has a logarithmic time complexity due to its underlying Red-Black tree structure.

When should I use TreeSet over HashSet?

You should use TreeSet when you need a sorted collection or when you need to perform range queries. If order is not important, HashSet is usually the better choice.

Are there any specific use cases for each?

Yes! Use HashSet for fast lookups and when you don't need ordering. Use TreeSet for applications that require sorted data, like maintaining a leaderboard.