I think that Immanuel Kant would say that Jean Valjean was an extremely moral human being. That choice he made was purely based on Good Will and by reasoning. Since Kant would say that Valjean had a duty to himself and since we are built this way and even after being in prison himself and knowing that this man will now have to go through the system that ruined his own life it was still his duty to turn himself in. The consequences didn’t matter since he was built to make such a choice to begin with. He must follow his moral rule inside himself.
I think that act utilitarian’s would also say that his decision was a somewhat moral one; He took this decision and decided what to do based on his intuition for this moment. At the same time, since they downplay the consequences, and utilitarian’s usually say that what is moral in any given situation is to maximize the good effects…so if Valjean was following this theory he would have not turned himself in. Since the greater good for the community and himself would have been to not tell the truth.
I think that Rule utilitarian’s would say,