ListSelectionEvent is entered twice?

Question

I have two jlists. The first one shows a list of companies in a database, the second one has to show some details about the company selected in the first list.
Thus, the second list has to change dynamically.
I work with a ListSelectionEvent of list1 to change the model in list2.
Now i have two problems:
- the listselection event is entered twice, i see all the details twice in the second list.
- in list2, the data should change, but it just pastes the new data under the existing one. is there a way to remove the previous data first en then insert the new?
My code:
//initializing components
list1.addListSelectionListener(new ListSelectionListener() {
     public void valueChanged(ListSelectionEvent e) {
          list1ValueChanged(e);
private void list1ValueChanged(ListSelectionEvent e) {
          list2.setModel(
                    new AbstractListModel(){
                         List<Meeting> meetings = d.getDesiredMeetings();
                         String[] values = convertToStringArray(d.getDesiredMeetingsOfCompany(list1.getSelectedValue().toString(), meetings).toArray());
                         public int getSize() { return values.length;}
                         public Object getElementAt(int i) { return values; }

Answer 1

while the selection is changed, say, dragging the mouse thru selections, each change fires an event with is-value-adjusting = true. Then final selection sends another event with false.
Personally, I'd like to see a mode that you can prevent the list from firing those intermediary events instead (cut off at the source), but you just check that flag as shown and you'll get what you want.