Value Not Being Assigned To Variable In If/Else Statement Inside A For Loop [duplicate]

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everyone...

I'm trying to assign a value to an Integer inside an if/else statement that's inside a for loop. The Integer has been created outside the for loop. Your help would be appreciated. Thanks in advance

public class Scrabble {
public Integer calculateScore(String aLetter) {
    String[] letters = { "a", "e", "i", "o", "u", "l", "n", "r", "s", "t" };
    Integer result;

    for (Integer i = 0; i < letters.length; i++) {
        if (letters[i] == aLetter) {
            result = 1;
        } else {
            result = 0;
        }
    }
    return result;

}
}