public static void main(String[] args) {
    LinkedList<String> linked = new LinkedList<>();
    linked.add("Jeovane");
    linked.addFirst("Mario");
    linked.addFirst("Eduardo");
    linked.addLast("Pedro");

    System.out.println("First: " + linked.getFirst());
    System.out.println("Last: " + linked.getLast());
    System.out.println("Size: " + linked.size());
    System.out.println("Empty? " + linked.isEmpty());
}