What are the advantages and disadvantages of using CopyOnWriteArrayList in Java?.

CopyOnWriteArrayList is a thread-safe implementation of the List interface in Java that uses a copying strategy during write operations.

Advantages:

• Well-suited for scenarios with a high number of read operations and infrequent data modifications.
• Allows safe and lock-free iteration over the list, as iterators work with an immutable copy.
• Simplifies multithreaded programming, reducing the likelihood of synchronization errors.

Disadvantages:

• Each write operation (add, set, remove) creates a new copy of the internal array, leading to high memory and time costs during frequent modifications.
• Inefficient for scenarios with intensive modifications.

Example usage:

CopyOnWriteArrayList<String> list = new CopyOnWriteArrayList<>();
list.add("A");
list.add("B");

for (String s : list) {
    System.out.println(s);
}

Iteration is safe even if the list is modified in another thread.