java linked list iterator

1public class BasicLinkedList<T> implements Iterable<T> {
2    public int size;
3
4    private class Node {
5        private T data;
6        private Node next;
7
8        private Node(T data) {
9            this.data = data;
10            next = null;
11        }
12    }
13
14    private Node head;
15    private Node tail;
16
17    public BasicLinkedList() {
18        head = tail = null;
19    }
20//Add, remove method 
21
22public Iterator<T> iterator() {
23        return new Iterator<T>() {
24
25            Node current = head;
26
27            @Override
28            public boolean hasNext() {
29                return current != null;
30            }
31
32            @Override
33            public T next() {
34                if(hasNext()){
35                    T data = current.data;
36                    current = current.next;
37                    return data;
38                }
39                return null;
40            }
41
42            @Override
43            public void remove(){
44                throw new UnsupportedOperationException("Remove not implemented.");
45            }
46
47        };
48

1// Java code to illustrate listIterator() 
2import java.io.*; 
3import java.util.LinkedList; 
4import java.util.ListIterator; 
5  
6public class LinkedListDemo { 
7    public static void main(String args[]) 
8    { 
9        // Creating an empty LinkedList 
10        LinkedList<String> list = new LinkedList<String>(); 
11  
12        // Use add() method to add elements in the list 
13        list.add("Geeks"); 
14        list.add("for"); 
15        list.add("Geeks"); 
16        list.add("10"); 
17        list.add("20"); 
18  
19        // Displaying the linkedlist 
20        System.out.println("LinkedList:" + list); 
21          
22        // Setting the ListIterator at a specified position 
23        ListIterator list_Iter = list.listIterator(2); 
24  
25        // Iterating through the created list from the position 
26        System.out.println("The list is as follows:"); 
27        while(list_Iter.hasNext()){ 
28           System.out.println(list_Iter.next()); 
29        } 
30    } 
31}