Javafx: Re-sorting a column in a TableView

I had the same problem and found out that after an update of the data you only have to call the function sort() on the table view:

TableView rooms;
...
// Update data of rooms
...
rooms.sort()

The table view knows the columns for sorting thus the sort function will sort the new data in the wanted order. This function is only available in Java 8.

Ok, I found how to do it. I will summarize it here in case it is useful to others:

Before you update the contents of the TableView, you must save the sortcolum (if any) and the sortType:

        TableView rooms;
        ...
        TableColumn sortcolumn = null;
        SortType st = null;
        if (rooms.getSortOrder().size()>0) {
            sortcolumn = (TableColumn) rooms.getSortOrder().get(0);
            st = sortcolumn.getSortType();
        }

Then, after you are done updating the data in the TableView, you must restore the lost sort-column state and perform a sort.

       if (sortcolumn!=null) {
            rooms.getSortOrder().add(sortcolumn);
            sortcolumn.setSortType(st);
            sortcolumn.setSortable(true); // This performs a sort
        }

I do not take into account the possibility of having multiple columns in the sort, but this would be very simple to do with this information.