JTable's JComboBox cell editor sets the value already when opening the list, even if clicked outside the combo-box

Question

JTable\'s JComboBox cell editor sets the value already when opening the list, even if clicked outside the combo-box. Moreover, once certain value selec

Answer 1

Your problem is because the current cell value is not one of the possible selections of the combobox editor, and so the combo defaults to the first selection. If you change your editor to include the current values, e.g.,

DefaultCellEditor cellEditor = new DefaultCellEditor(
        new JComboBox<>(new Integer[] { 1, 2,3, 4, 5, 6, 7, 8, 9 }));

Then it works just fine and as expected.

If you want a more fine-grained control over the editor, then you'll want to roll your own and not use the default one.