Concurrent package: internal working of CopyOnWriteArrayList Diff between synchronized collection and concurrent collection

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Explaining CopyOnWriteArrayList and difference between synchronized and concurrent collections.

CopyOnWriteArrayList is a thread-safe variant of ArrayList where all mutative operations are implemented by making a new copy of the underlying array.
Synchronized collections use a single lock to synchronize access to the collection, while concurrent collections use multiple locks to allow concurrent access.
Concurrent collections are designed to handle high-concurrency scenarios, while synchronized collections are suitable for low-concurrency scenarios.
Examples of concurrent collections include ConcurrentHashMap and ConcurrentLinkedQueue, while examples of synchronized collections include ArrayList and LinkedList.

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