How to update a linked list ?

JAVA Program

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);
	}
}

Output

BBTHP
BBMHP