Language: JAVA 
Github: @lgahdl

Doubly Linked List with Cursor:

The doubly linked list with cursor is a type of list that works using a parameter called "cursor".
This parameter(cursor) is always pointing to an element of the list, and run through it to make all operations
requested by the User.

POSITION OF THE CURSOR AFTER OPERATIONS:
When the user removes or inserts any element of the list, the cursor will point to the element inserted or the element right before the element removed;

POSITION OF THE FIRST AND LAST ELEMENTS AFTER OPERATIONS:
When the first element is removed, the first is moved to the next element(second);
When the last element is removed, the last is moved to the previous element(last but one);

Methods:
	//RETURNS SIZE
	public int getSize();
	
	//RETURNS MAX
	int getMax();

	//SETS NEW MAX
	void setMax(int max);	
	
	//GET ELEMENT OF THE LIST USING ITS KEY
	public Element get(String key) throws Exception;
	
	//GET ELEMENT OF THE LIST USING POSITION(INDEX)
	public Element getByIndex(int index) throws Exception;
	
	//GET ELEMENT OF THE LIST THAT IS CURRENTLY APPOINTED BY THE CURSOR
	public Element getCurrent();
	
	//INSERT AN ELEMENT BEFORE THE CURSOR AND MOVES THE CURSOR TO THE ELEMENT INSERTED
	public void insertBeforeCurrent(Element element) throws Exception;
	
	//INSERT AN ELEMENT AFTER THE CURSOR AND MOVES THE CURSOR TO THE ELEMENT INSERTED
	public void insertAfterCurrent(Element element) throws Exception;
	
	//INSERT AN ELEMENT ON THE END AND MOVES THE CURSOR TO THE ELEMENT INSERTED
	public void insertOnEnd(Element element) throws Exception;
	
	//INSERT AN ELEMENT ON THE START AND MOVES THE CURSOR TO THE ELEMENT INSERTED
	public void insertOnStart(Element element) throws Exception;
	
	//INSERT AN ELEMENT ON THE POSITION AND MOVES THE CURSOR TO THE ELEMENT INSERTED
	public void insertOnPosition(int pos, Element element) throws Exception;
	
	//REMOVES THE ELEMENT APPOINTED BY THE CURSOR AND MOVES THE CURSOR TO THE ELEMENT BEFORE
	public void removeCurrent() throws Exception;
	
	//REMOVES THE FIRST ELEMENT AND MOVES THE CURSOR TO THE NEW FIRST
	public void removeFirst() throws Exception;
	
	//REMOVES THE LAST ELEMENT AND MOVES THE CURSOR TO THE ELEMENT BEFORE
	public void removeLast() throws Exception;
	
	//REMOVES ELEMENT USING ITS KEY AND MOVES THE CURSOR TO THE ELEMENT BEFORE
	public void removeByKey(String key) throws Exception;
	
	//REMOVES ELEMENT USING ITS INDEX AND MOVES THE CURSOR TO THE ELEMENT BEFORE
	public void removeByIndex(int index) throws Exception;
	
	//RETURNS true IF THE ELEMENT IS ON LIST AND false IF IT DOESN'T
	public boolean isOnList(String key);
	
	//RETURNS true IF THE LIST IS EMPTY AND false IF IT DOESN'T
	public boolean isEmpty();
	
	//RETURNS true IF THE LIST IS FULL AND false IF IT DOESN'T
	public boolean isFull();
	
	//RETURNS true IF THE ELEMENT IS ON LIST AND false IF IT DOESN'T
	public boolean contains(String name) throws Exception;
	
	//RETURNS POSITION(INDEX) OF THE ELEMENT WITH THIS KEY
	public int positionOf(String key) throws Exception;