Have you used the LinkedList data structure in your projects?

Yes, I have used the LinkedList data structure in projects where efficient insertion and deletion of elements in the middle of the list were required.

LinkedList implements a doubly linked list, which allows for quick addition and removal of elements without shifting the rest, unlike ArrayList.

Example of using LinkedList:

LinkedList<String> queue = new LinkedList<>();
queue.addLast("First");
queue.addLast("Second");
String first = queue.removeFirst(); // Retrieves and removes the first element

LinkedList is useful for implementing queues, stacks, and other data structures with frequent insert/delete operations at the beginning or middle of the collection.