JComboBox as Jtable CellEditor with Overriden stopCellEditing modifies wrong table cell

Question

I have a custom JTable with a custom TableModel using a JComboBox as a cell editor. The ComboBox also has a custom ComboBoxModel The ComboBox model holds multiple fields that wi

Answer 1

Ok, I've done some changes and I think I got something working. If it is not the best practice and you got a better implementation, please post an answer.

Edit: Do not follow the example below! Following kleopatra's comments it is a wrong implementation. I'm leaving it here so you know how not to do it.

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.DefaultCellEditor;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;

public class TestComboCellEditor {

    public static void main(String[] args) {

        TestComboCellEditor test = new TestComboCellEditor();
        test.go();
    }

    public void go() {

        //create the frame
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // create and add a tabbed pane to the frame
        JTabbedPane tabbedPane = new JTabbedPane();
        frame.getContentPane().add(tabbedPane);
        //create a table and add it to a scroll pane in a new tab
        final JTable table = new JTable(new DefaultTableModel(new Object[]{"A", "B"}, 5));
        JScrollPane scrollPane = new JScrollPane(table);
        tabbedPane.addTab("test", scrollPane);

        // create a simple JComboBox and set is as table cell editor on column A
        Object[] comboElements = {"aaaaa1", "aaaaaa2", "b"};
        final JComboBox comboBox = new JComboBox(comboElements);
        comboBox.setEditable(true);
        table.getColumn("A").setCellEditor(new DefaultCellEditor(comboBox) {
            @Override
            public boolean stopCellEditing() {
                if (comboBox.isEditable()) {
                    DefaultComboBoxModel comboModel = (DefaultComboBoxModel) comboBox.getModel();
                    String selectedItem = (String) comboModel.getSelectedItem();
                    int selectedIndex = comboModel.getIndexOf(selectedItem);
                    if (!(selectedIndex == -1)) {
                        comboBox.actionPerformed(new ActionEvent(this, selectedIndex, "blabla"));
                    } else if (selectedItem != null) {
                        // missing code - adding new info to a custom JComboBox model and to alter info inside a custom table model
                    }
                }
                return super.stopCellEditing();
            }
        });

        comboBox.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                // the selected item exists as an Option inside the ComboBox
                if (e.getActionCommand().equals("blabla")) {
                    DefaultComboBoxModel comboModel = (DefaultComboBoxModel) comboBox.getModel();
                    String selectedItem = (String) comboModel.getSelectedItem();
                    DefaultTableModel tableModel = (DefaultTableModel) table.getModel();
                    int selectedRow = table.getSelectedRow();
                    int selectedColumn = table.getSelectedColumn();
                    tableModel.setValueAt(selectedItem, selectedRow, selectedColumn);
                }
            }
        });

        // pack and show frame
        frame.pack();
        frame.setVisible(true);

    }
}