What are the performance differences between synchronized and concurrent collections?

What are the performance differences between synchronized and concurrent collections?

Synchronized collections are thread-safe but can lead to bottlenecks due to locking. Concurrent collections allow for higher throughput by using non-blocking algorithms.

Can you give an example of when to use each type?

Use synchronized collections when you have a small number of threads and need simplicity. Use concurrent collections for high-performance scenarios with many threads.

What are some common concurrent collections in Java?

Common concurrent collections in Java include ConcurrentHashMap, CopyOnWriteArrayList, and BlockingQueue.

Are there any downsides to using concurrent collections?

Yes, concurrent collections can have higher memory overhead and may introduce complexity in understanding their behavior.