How does ConcurrentHashMap work in Java?

Can you explain how ConcurrentHashMap works in Java?

Sure! ConcurrentHashMap is a thread-safe variant of HashMap that allows concurrent access by multiple threads.

What makes it different from a regular HashMap?

The main difference is that ConcurrentHashMap allows multiple threads to read and write without locking the entire map, improving performance.

How does it achieve thread safety?

It uses a technique called segmentation, where the map is divided into segments, allowing concurrent access to different segments.

Are there any limitations I should be aware of?

Yes, while it allows concurrent access, operations like size() may not be completely accurate due to ongoing modifications.