How to make a JButton in a JTable cell click-able?

I based my last example on the code provided by mKrobels answer to How to implement dynamic GUI in swing

The main difference between his and my example in the question is that he use DefaultTableModel and I use AbstractTableModel. His example does work, but not mine.

The solution I found was that I had to implement isCellEditable() in the TableModel, so with this method added, my example works:

@Override
public boolean isCellEditable(int rowIndex, int columnIndex) {
    return true;
}

The renderer is just a display for painting the cells. You need an editor component that allows you to make changes.

Take a look at:

http://download.oracle.com/javase/6/docs/api/javax/swing/table/TableCellEditor.html

Here's one way to use ButtonColumn.

public class TableTest extends JFrame {

    public TableTest() {
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JTable table = new JTable(new TestModel());
        table.getColumnModel().getColumn(1).setPreferredWidth(3);
        table.getColumnModel().getColumn(2).setPreferredWidth(3);
        this.add(new JScrollPane(table));
        Action increase = new AbstractAction("+") {

            @Override
            public void actionPerformed(ActionEvent e) {
                JTable table = (JTable) e.getSource();
                int row = Integer.valueOf(e.getActionCommand());
                TestModel model = (TestModel) table.getModel();
                model.increment(row, 0);
            }
        };
        ButtonColumn inc = new ButtonColumn(table, increase, 1);
        Action decrease = new AbstractAction("-") {

            @Override
            public void actionPerformed(ActionEvent e) {
                JTable table = (JTable) e.getSource();
                int row = Integer.valueOf(e.getActionCommand());
                TestModel model = (TestModel) table.getModel();
                model.decrement(row, 0);
            }
        };
        ButtonColumn dec = new ButtonColumn(table, decrease, 2);
        pack();
    }

    public static void main(String[] args) {
        new TableTest().setVisible(true);
    }
}

class TestModel extends AbstractTableModel {

    List<TestRecord> records = new LinkedList<TestRecord>();

    private static class TestRecord {

        private int val = 0;
    }

    public void increment(int row, int col) {
        records.get(row).val++;
        fireTableCellUpdated(row, 0);
    }

    public void decrement(int row, int col) {
        records.get(row).val--;
        fireTableCellUpdated(row, 0);
    }

    public TestModel() {
        records.add(new TestRecord());
        records.add(new TestRecord());
    }

    @Override
    public Class<?> getColumnClass(int col) {
        if (col == 0) {
            return Integer.class;
        } else {
            return ButtonColumn.class;
        }
    }

    @Override
    public boolean isCellEditable(int row, int col) {
        return true;
    }

    @Override
    public int getColumnCount() {
        return 3;
    }

    @Override
    public int getRowCount() {
        return records.size();
    }

    @Override
    public Object getValueAt(int row, int col) {
        if (col == 0) {
            return records.get(row).val;
        } else if (col == 1) {
            return "+";
        } else {
            return "-";
        }
    }
}