New to Java

The following method is taken from an implementation of LinkedList. It is not an infinite looping recursion, even though the method seems to invoke itself.

    @Override
    public String toString() {
        StringBuilder result = new StringBuilder("[");
        Node<E> current = head;
        for (int i = 0; i < size; i++) {
            result.append(current.element);
            current = current.next;
            if (current != null) {
                result.append(", ");
            } else {
                result.append("]");
            }
        }
        return result.toString();
    }

I presume that the penultimate line invokes a super.toString() method. But I feel insecure with this presumption. A confirmation or an alternative explanation would be appreciated.