What are the performance differences between Java collections?
Java collections include various types like ArrayList, LinkedList, HashSet, and TreeSet. Each has different performance characteristics depending on operations like insertion, deletion, and access.
Can you explain when to use ArrayList over LinkedList?
Use ArrayList when you need fast random access and when the size of the list is relatively stable. LinkedList is better for frequent insertions and deletions.
What about HashSet and TreeSet? How do they compare?
HashSet offers constant time performance for basic operations, while TreeSet provides log(n) time performance and maintains order. Use HashSet for faster operations and TreeSet when you need sorted elements.
Are there any scenarios where one is significantly better than the other?
Yes, for example, if you need to maintain a sorted order and perform range queries, TreeSet is significantly better. For large datasets with frequent lookups, HashSet is preferred.
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