What are the differences between Java Collections and Concurrent Collections?

What are the differences between Java Collections and Concurrent Collections?

Java Collections are designed for single-threaded environments, while Concurrent Collections are optimized for multi-threaded access.

Can you give me examples of each?

Sure! An example of a Java Collection is ArrayList, and an example of a Concurrent Collection is ConcurrentHashMap.

When should I use Concurrent Collections?

Use Concurrent Collections when you need to handle multiple threads accessing the same collection simultaneously to avoid data inconsistency.

Are there performance differences between them?

Yes, Concurrent Collections generally have better performance in multi-threaded scenarios due to their design, which reduces contention.