What is the difference between `ConcurrentHashMap` and `Collections.synchronizedMap()`?

Java Associate Hard

Java Associate — Hard

What is the difference between `ConcurrentHashMap` and `Collections.synchronizedMap()`?

Key points

  • ConcurrentHashMap offers higher concurrency with segment-level locking or CAS operations
  • synchronizedMap uses a single monitor lock for all operations
  • The difference lies in the concurrency mechanisms used
  • ConcurrentHashMap is more efficient for concurrent operations
  • synchronizedMap may lead to contention in high-concurrency scenarios

Ready to go further?

Start full exam Practice more questions

Related questions