private static final Set<String> trueSet = new HashSet<String>(Arrays.asList("1", "true", "yes"));
    private static final Set<String> falseSet = new HashSet<String>(Arrays.asList("0", "false", "no"));
    public static boolean stringToBool(String s) {
        s = s.toLowerCase();

        if (trueSet.contains(s))
            return true;
        if (falseSet.contains(s))
            return false;

        throw new IllegalArgumentException(s + " is not a boolean.");
    }