What tasks does the LinkedList data structure solve in Java?

LinkedList in Java implements a doubly linked list, where each element stores a reference to the previous and next elements. This allows efficient insertion and deletion operations in the middle of the list, as it does not require shifting other elements, unlike ArrayList.

Main tasks of LinkedList:

• Fast insertion and deletion of elements anywhere in the list.
• Implementation of queues and stacks (using methods like addFirst, addLast, removeFirst, etc.).

Example usage:

LinkedList<String> list = new LinkedList<>();
list.add("First");
list.add("Second");
list.add(1, "Inserted"); // insertion in the middle
list.removeLast();

Thus, LinkedList is convenient when many insertion/deletion operations are required, rather than quick random access by index.