Difference between lock and sync

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Lock and sync are both mechanisms used in Java for thread synchronization, but they have different implementations and use cases.

Lock is a low-level synchronization mechanism provided by the java.util.concurrent.locks package, while sync (synchronized keyword) is a high-level synchronization mechanism provided by Java.
Lock provides more flexibility and control over synchronization compared to sync.
Lock can be used to create more complex synchronization patterns, such as reentrant locks and condition variables.
Sync is easier to use and understand for simple synchronization needs.
Example: Using Lock interface - ReentrantLock lock = new ReentrantLock(); lock.lock(); try { // critical section } finally { lock.unlock(); }
Example: Using sync keyword - public synchronized void synchronizedMethod() { // synchronized code block }

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