private static boolean isPasswordCorrect(char[] input,char[] correctPassword) {
    boolean isCorrect = true;
    //char[] correctPassword = {};

    if (input.length != correctPassword.length || input == null) {
        isCorrect = false;
    } else {
        isCorrect = Arrays.equals (input, correctPassword);
    }

    //Zero out the password.
    Arrays.fill(correctPassword,'0');

    return isCorrect;
}