I need help with this doubly linked list methods. I am very lost. Thank you.

public class DoublyCircularLinkedListimplementation implements DoublyCicularLinkedList protected int size-0; public DoublyCircularLinkedListimplementation0 // TODO public int size) [ return size @Override public T getT element) // Returns an element e from this list such that e.equals(element); // if no such element exists, returns null. /l String toStringl: // Returns a nicely formatted string that represents this list. @override public void reset0 f // Initializes current position for an iteration through this list // to the first element on this list @Override public T getNext // Preconditions: The list is not empty //The list has been reset /The list has not been modified since the most recent //reset Returns the element at the current position on this list // If the current position is the last element, then it advances the value // of the current position to the first element; //otherwise, it advances // the value of the current position to the next element. @Override public T getPrevious0 //Returns the element at the current position on this list. //If the current position is the first element, then it advances the value //of the current position to the last element; otherwise, it advances //the value of the current position to the previous elements //@return the info of type T