package com.coding.basic; public class LinkedList implements List { private static class Node{ Object date; Node next; } private Node head; @Override public void add(Object o) { } @Override public void add(int index, Object o) { } @Override public Object get(int dex) { return null; } @Override public Object remove(int index) { return null; } @Override public int size() { return 0; } public void addFirst(Object o){ } public void addLast(Object o){ } public Object removeFirst(){ return null; } public Object removeLast(){ return null; } public Iterator iterator(){ return null; } }