How do synchronized locks compare in performance in Java?

How do synchronized locks compare in performance in Java?

Synchronized locks in Java can vary in performance based on the context. Generally, they are simple to use but can lead to contention issues.

What are the alternatives to synchronized locks?

Alternatives include ReentrantLock, ReadWriteLock, and using atomic variables. Each has its own use cases and performance characteristics.

Can you explain how ReentrantLock works?

ReentrantLock allows a thread to re-enter the lock it already holds, providing more flexibility than synchronized blocks.

What are the performance implications of using ReadWriteLock?

ReadWriteLock allows multiple readers or one writer, improving performance in read-heavy scenarios but adding complexity.

When should I use atomic variables instead of locks?

Use atomic variables when you need simple operations on shared variables without the overhead of locking, especially in high-concurrency scenarios.