What are the best practices for using ConcurrentHashMap in Java?

What are the best practices for using ConcurrentHashMap in Java?

When using ConcurrentHashMap, it's important to avoid using methods that can lead to inconsistent states, like iterating while modifying.

Can you explain how to properly iterate over a ConcurrentHashMap?

You can use the forEach method or the keySet() method to safely iterate over the map without risking ConcurrentModificationException.

What about performance considerations?

ConcurrentHashMap is designed for high concurrency, but be mindful of the load factor and initial capacity to optimize performance.

Are there any common pitfalls to avoid?

Yes, avoid using methods like size() or isEmpty() in a multi-threaded context, as they may not reflect the current state accurately.