Implement LinkedList and perform given operations

LinkedListDemo.java

import java.util.*;
public class LinkedListDemo
{
      public static void main(String args[])
      {
             // create a linked list
             LinkedList<String> ll = new LinkedList<String>();
             System.out.println("Initial size of LinkedList: "+ll.size());
     
             // add elements to the linked list
             ll.add("Pune");
             ll.add("Mumbai");
             ll.add("Delhi");
             ll.add("Noida");
             System.out.println("Element of LinkedList: " + ll);
             System.out.println("Size of LinkedList after addition: "+ll.size());

             // remove elements from the linked list
             ll.remove(2);
             System.out.println("Element of LinkedList after deletion: " + ll);
             System.out.println("Size of the LinkedList after deletion: "+ll.size());
      
             // remove first and last elements
             ll.removeFirst();
             ll.removeLast();
             System.out.println("ll after deleting first and last: " + ll);
             System.out.println("Size of the LinkedList after deletion: "+ll.size());
     
             //Retriving First and Last element
             System.out.println("Fisrt element of LinkedList: "+ll.getFirst());
             System.out.println("Last element of LinkedList: "+ll.getLast());

             Iterator<String> itr = ll.iterator();
             while(itr.hasNext())
             {
                   System.out.print(itr.next()+", ");
             }
      }
}