Updating Linked in java pgm

Updating Linked List

import java.util.LinkedList;

public class MainClass

{

 public static void main(String[] a)

 {

      LinkedList officers = new LinkedList();

      officers.add("B");

      officers.add("B");

      officers.add("T");

      officers.add("H");

      officers.add("P");

      System.out.println(officers);

      officers.set(2, "M");

      System.out.println(officers);

   }

}