How does the Java Collections Framework impact performance?

How does the Java Collections Framework impact performance?

The Java Collections Framework provides various data structures, each optimized for different performance scenarios. For example, ArrayList offers fast random access, while LinkedList excels in insertions and deletions.

What are the performance differences between ArrayList and LinkedList?

ArrayList has O(1) time complexity for accessing elements, but O(n) for insertions and deletions. LinkedList has O(n) for access but O(1) for insertions and deletions.

When should I use HashMap over TreeMap?

Use HashMap for faster access with O(1) average time complexity, while TreeMap is better for sorted order with O(log n) time complexity.

Are there any performance considerations for using HashSet?

Yes, HashSet offers O(1) time complexity for add, remove, and contains operations, but performance can degrade if the hash function is poor or if there are many collisions.