Remove Duplicates In A Sorted Linked List

I/O:

10 2 2 2 3 3 5 5 5 5 5

O/P:

2 2 2 3 3 5 5 5 5 5 2 3 5

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Remove_Duplicates_In_A_Sorted_LinkedList {
    public static class Node {
        int data;
        Node next;
    }

    public static class LinkedList {
        Node head;
        Node tail;
        int size;

        void addLast(int val) {
            Node temp = new Node();
            temp.data = val;
            temp.next = null;

            if (size == 0) {
                head = tail = temp;
            } else {
                tail.next = temp;
                tail = temp;
            }

            size++;
        }

        public int size() {
            return size;
        }

        public void display() {
            for (Node temp = head; temp != null; temp = temp.next) {
                System.out.print(temp.data + " ");
            }
            System.out.println();
        }

        // write your code here
        public void removeDuplicates() {
            Node temp = head;

            while (temp.next != null) {
                if (temp.data == temp.next.data) {
                    temp.next = temp.next.next;
                } else {
                    temp = temp.next;
                }
            }
        }

    }

    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int n1 = Integer.parseInt(br.readLine());
        LinkedList l1 = new LinkedList();
        String[] values1 = br.readLine().split(" ");
        for (int i = 0; i < n1; i++) {
            int d = Integer.parseInt(values1[i]);
            l1.addLast(d);
        }

        l1.display();
        l1.removeDuplicates();
        l1.display();
    }
}