How do thread-safe collections compare in Java?

What are thread-safe collections in Java?

Thread-safe collections are data structures that are designed to be safely accessed by multiple threads simultaneously.

Can you compare ArrayList and CopyOnWriteArrayList?

Sure! ArrayList is not thread-safe, while CopyOnWriteArrayList is thread-safe and suitable for scenarios with more reads than writes.

What about HashMap and ConcurrentHashMap?

HashMap is not thread-safe, but ConcurrentHashMap allows concurrent access and is designed for high concurrency.

When should I use a thread-safe collection?

Use a thread-safe collection when multiple threads need to read and write to the same collection to avoid data inconsistency.