jtable.setModel gives java.lang.ArrayIndexOutOfBoundsException: -1

Question

I have a jbutton which loads data from a DB, and then populates a jtable (using a DefaultTableModel)

Then, I have this event on the row selection of the table:

jTableDettagliFattura.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
                @Override
                public void valueChanged(ListSelectionEvent event) {
                    int selected= jTableDettagliFattura.getSelectedRow();
                    String id = jTableDettagliFattura.getModel().getValueAt(selected, 0).toString();
                    System.out.println(id);
                }
            });

When I load the table for the first time (using the button), everything works fine. But if I select one of the table rows, and then reload the table with the button, I get the "java.lang.ArrayIndexOutOfBoundsException: -1", at the command "jTableDettagliFattura.setModel(model);" (that was perfectly working the first time).

What could be the problem? Is the selection event somehow "ruining" my model?

Answer 1

But if I select one of the table rows, and then reload the table with the button, I get the "java.lang.ArrayIndexOutOfBoundsException: -1"

There is no row selected when the model is reloaded. The listener probably fires an event to indicate the selection was removed.

Try:

int selected = jTableDettagliFattura.getSelectedRow();

if (selected == -1) return;

The main point is don't assume a row is selected. Validate the index before doing your processing.