Finding a position of an item in a list.

Question

What i am looking to do is find the position of an item in a list. for instance if my list contains [a, b, c, d, e] and on my command line i put a f d, i want it to return a value of 3 for the position of the 'd' in my list. Could anyone please advise the best way to complete this? I think i am having the problem of it recognizing the 'd'. I would appreciate any help. Here is a piece of my code.
import java.io.InputStreamReader;
import java.util.LinkedList;
import java.util.Scanner;
public class LinknedList {
     public static void main(String args[]) {
          Scanner scanner = new Scanner(new InputStreamReader(System.in));
          // Setting up the link list of strings
          LinkedList<String> list = new LinkedList<String>();
          // MyLinkedList myList = new MyLinkedList();
          while (scanner.hasNext()) {
               char option = scanner.next().charAt(0);
               option = Character.toLowerCase(option);
               switch (option) {
               // inserts to end of list
               case 'i':
                    if (scanner.hasNext()) {
                         String value = scanner.next();
                         list.addLast(value);
                         // myList.addLast(value);
                    } else {
                         System.out.println("ERROR: Unexpected end of input \"a\"");
                    break;
               case 'r':
                    if (!list.isEmpty()) {
                         System.out.println("Removed: " + list.removeFirst());
                    } else {
                         System.out.println("ERROR: List was empty");
                    break;
               case 'p':
                    System.out.println(list.toString());
                    break;
               case 'a':
                    if (scanner.hasNext()) {
                         String value = scanner.next();
                         list.add(0, value);
                    } else {
                         System.out.println("ERROR: Unexpected end of input \"a\"");
                    break;
               case 'd':
                    list.clear();
                    System.out.println("Your list has been deleted.");
                    break;
               case 's':
                    int num = list.size();
                    if (num == 0) {
                         System.out
                                   .println("The list does not have any items in it.");
                    } else
                         System.out.println("Your list is " + num + " items long.");
                    break;
               case 'f':
                    // need to find the position of an letter on the command line
                    break;
               default:
                    System.out.println("Not an option: " + option);
                    break;
               System.out.println("Java: " + list.toString());
               System.out.println("Mine: ");
}

Answer 1

What i am doing is building a Linked List. It will have a standard input. you have multiple commands. i, a, d, p, s, f. i will insert, a will add, d will delete, p will print, s will display amount of items on the list and f will set the position in the list. For example. if i type:
a john
the result will be:
[john]
a paul
the result will be:
[jon, paul]
Lets say i have the list with the items [jon, paul, ringo, geroge] in it and i choose:
f paul
a stuart
the result will be:
[jon, paul, stuart, ringo, george]
I want the f switch statement to make a new point in the list where the new item will be added.