How do different data structures in Java affect performance?

How do different data structures in Java affect performance?

The performance of data structures in Java varies based on their implementation and use case. For example, ArrayLists provide fast random access but slow insertions, while LinkedLists allow for quick insertions but slower access times.

Can you explain the time complexity of ArrayList and LinkedList?

Sure! ArrayList has an average time complexity of O(1) for access and O(n) for insertion and deletion, while LinkedList has O(n) for access but O(1) for insertion and deletion.

Which one should I use for a large dataset?

If you need fast access and your dataset is mostly read-heavy, go with ArrayList. If you frequently add or remove elements, LinkedList might be better.

Are there any other data structures I should consider?

Yes, consider using HashMap for key-value pairs, or TreeSet if you need sorted data. Each has its own performance characteristics.