What is the difference between synchronized and locks in Java?

What is the difference between synchronized and locks in Java?

In Java, 'synchronized' is a keyword that allows you to control access to a method or block by multiple threads. It ensures that only one thread can access the synchronized block at a time.

How do locks differ from synchronized blocks?

Locks provide more flexibility than synchronized blocks. For example, you can try to acquire a lock without blocking, and you can also unlock from a different thread.

Are there any performance differences between using synchronized and locks?

Yes, locks can offer better performance in scenarios with high contention, as they allow for more sophisticated locking mechanisms like read/write locks.

When should I use synchronized instead of locks?

Use synchronized for simpler cases where you need quick thread safety without the overhead of managing lock objects. It's easier to implement.