public TreeMap<String,Place> listeDesPlaces()
	{
		/** La liste des places libres. */
		TreeMap<String,Place> listePlaces = new TreeMap<String,Place>() ;
		StringBuilder laRangee = new StringBuilder() ;
		
		for (int rang=0 ; rang<nbRangees ; rang++)
		{	incrementer(laRangee) ;
			String rangee = laRangee.toString();
			for (int num=1 ; num<=nbParRangee ; num++)
			{
				Place p = new Place(rangee,num) ;
				listePlaces.put(p.getName(),p) ;
			}
		}
		return listePlaces ;
	}