Is the LinkedList data structure singly linked or doubly linked?

The LinkedList data structure in Java is implemented as a doubly linked list. This means that each element (node) contains a reference to the next and previous elements in the list.

Such a structure allows efficient operations for inserting and deleting elements from both ends of the list, as well as moving in both directions.

If a singly linked structure is needed, it is usually implemented manually or other classes are used.