private static boolean popTwo() {
        if ( calcStack.getCount() < 2 ) {
            System.out.println("Insufficient operand count");
            if ( calcStack.getCount() == 1 )
                System.out.println(calcStack.getValueAtIndex(0));
            return false;
        }
        else {
            x = calcStack.pop();
            y = calcStack.pop();
            return true;
        }
    }