Bug when using JComboBox as JTable CellEditor

Question

Hello! I have a JTable that displays database information, and one of the columns is editable using a JComboBox. When the user selects an item from the JComboBox, the database (and consequently the JTable) is updated with the new value.
Everything works fine except for a serious and subtle bug. To explain what happens, here is an example. If Row 1 has the value "ABC" and the user selects the editable column on that row, the JComboBox drops down with the existing value "ABC" already selected (this is the default behavior, not something I implemented). Now, if the user does not select a new value from the JComboBox, and instead selects the editable column on Row 2 that contains "XYZ", Row 1 gets updated to contain "XYZ"!
The reason that is happening is because I'm updating the database by responding to the ActionListener.actionPerformed event in the JComboBox, and when a new row is selected, the actionPerformed event gets fired BEFORE the JTable's selected row index gets updated. So the old row gets updated with the new row's information, even though the user never actually selected a new item in the JComboBox.
If I use ItemListener.itemStateChanged instead, I get the same results. If I use MouseListener.mousePressed/Released I get no events at all for the JComboBox list selection. If anyone else has encountered this problem and found a workaround, I would very much appreciate knowing what you did. Here are the relavent code snippets:
// In the dialog containing JTable:
JComboBox cboRouteType = new JComboBox(new String[]{"ABC", "XYZ"));
cboRouteType.addActionListener(new ActionListener() {
     public void actionPerformed(ActionEvent ev) {
          doCboRouteTypeSelect((String)cboRouteType.getSelectedItem());
private void doCboRouteTypeSelect(String selItem) {
     final RouteEntry selRoute = tblRoutes.getSelectedRoute();
     if (selRoute == null) { return; }
     RouteType newType = RouteType.fromString(selItem);
     // Only update the database if the value was actually changed.
     if (selRoute.getRouteType() == newType) { return; }
     RouteType oldType = selRoute.getRouteType();
     selRoute.setRouteType(newType);
     // (update the db below)
// In the JTable:
public RouteEntry getSelectedRoute() {
     int selIndx = getSelectedRow();
     if (selIndx < 0) return null;
     return model.getRouteAt(selIndx);
// In the TableModel:
private Vector<RouteEntry> vRoutes = new Vector<RouteEntry>();
public RouteEntry getRouteAt(int indx) { return vRoutes.get(indx); }

Answer 1

Update: I was able to resolve this issue. In case anyone is curious, the problem was caused by using the actionPerformed method in the first place. Apparently when the JComboBox is used as a table cell editor, it calls setValueAt on my table model and that's where I'm supposed to respond to the selection.
Obviously the table itself shouldn't be responsible for database updates, so I had to create a CellEditListener interface and implement it from the class that actually does the DB update in a thread and is capable of reporting SQL exceptions to the user. All that work just to let the user update the table/database with a dropdown. Sheesh!