When should I use a ConcurrentHashMap?

What is a ConcurrentHashMap and when should I use it?

A ConcurrentHashMap is a thread-safe variant of HashMap. You should use it when multiple threads access a map concurrently.

Can you explain the advantages of using ConcurrentHashMap over synchronized collections?

Sure! ConcurrentHashMap allows concurrent read and write operations without locking the entire map, improving performance.

Are there any scenarios where I shouldn't use ConcurrentHashMap?

Yes, if you need to maintain order or require atomic operations on multiple keys, consider using other data structures.

How does ConcurrentHashMap handle collisions?

It uses a technique called lock striping, which allows multiple threads to access different segments of the map simultaneously.