What factors affect the performance of HashMap in Java?

What factors affect the performance of HashMap in Java?

The performance of HashMap in Java is influenced by factors like load factor, initial capacity, and hash function efficiency.

How does the load factor impact performance?

The load factor determines when to resize the HashMap. A higher load factor reduces space but increases collision chances, affecting performance.

What is the ideal load factor for HashMap?

The default load factor is 0.75, which offers a good trade-off between time and space complexity. However, it can be adjusted based on specific use cases.

Can you explain how collisions are handled in HashMap?

Collisions in HashMap are handled using linked lists or trees (in Java 8 and later). When two keys hash to the same index, they are stored in a list or tree at that index.