Scrabble Sum Numbers in File

I am supposed to take in string of letters and return the score as an integer by summing the score of each individual letter. The issue that I am having is that I was supposed to put that information from the file line by line below into the array (which I did), but I don't know how I am supposed to take that array and correspond the letter to the number. I feel like I need to create an associative array, but then there would be no point to creating the first array. I hope this makes sense, if not please let me know.

A 1
B 3
C 3
D 2
E 1
F 4
G 2
H 4
I 1
J 8
K 5
L 1
M 3
N 1
O 1
P 2
Q 10
R 1
S 1
T 1
U 1
V 4
W 4
X 8
Y 4
Z 10

Here is the actual code that I have written thus far, and the ScoreSum method is where I am having the issues.

import java.io.*;
import java.util.Scanner;

public class ScrabbleSolver {
String inputFile = "letterVals.txt";
String[]lines = new String[26];

public static void main(String[] args)
    {
        ScrabbleSolver scrabble = new ScrabbleSolver();
        scrabble.UserInput();
        scrabble.ScrabbleScore();
    }

    public ScrabbleSolver()
    {
        try
        {
            //Create stream for reading file
            FileReader fin = new FileReader(inputFile);
            //Create input stream for program
            BufferedReader read = new BufferedReader( fin);

            String nextLine = read.readLine();
            int i = 0;
            while ( nextLine != null)
            {
                lines[i] = nextLine;
                nextLine = read.readLine();
                i++;
            }
            read.close();
        }
        catch (IOException e)
        {
            System.err.println("Error while inputing file.");
            System.err.println(e.getStackTrace());
        }
    }

    public int ScoreSum( )
    {
        String eWord;
        int sum = 0;
        for (int i = 0; i < eWord.length(); i++)
        {
            //int w= Integer.parseInt(eWord);
            sum += lines[eWord.charAt(i)];
            System.out.println(lines[i]);
        }
        System.out.println("Score = " + sum);
        return sum;
    }       
}