Set the selected Jtree Node to JTable

Question

The function need to be accomplished is:

1. Select main group
2. Select from sub-group (TEST NAME)
3. Click >> button which means move the selection to Jtable
4. Show the slected (Test) with corresponding price on Jtable

conditions:

• if the selected node (test name) alread has been selected and added to the Jtable show message say: Test name already added.
• we can select and add many test name

Demo image

impotant to say that JTree data come from two tables main-group and sub-group

Here the code: of >> button

  try {
        DefaultMutableTreeNode selectedElement = (DefaultMutableTreeNode) TestTree.getSelectionPath().getLastPathComponent();
        Object[] row = {selectedElement};
        DefaultTableModel model = (DefaultTableModel) myTests_table.getModel();
        System.out.println(String.valueOf(row).toString() + "Hi");
        if (selectedElement.isLeaf() == true) {
            //model.addRow(row);
            // retrive date from DB price
            String sql = "SELECT  sub_group.name AS 'name', sub_group.price AS 'price'"
                    + "FROM sub_group \n"
                    + "where sub_group.name = '" + row + "' ";
            pst = conn.prepareStatement(sql);
            rs = pst.executeQuery(sql);
            while (rs.next()) {
                myTests_table.setModel(DbUtils.resultSetToTableModel(rs));
            }
        } else {
            JOptionPane.showMessageDialog(null, "Please Choose Test name!", "Error", JOptionPane.WARNING_MESSAGE);
        }
    } catch (Exception e) {
        JOptionPane.showMessageDialog(null, "Error");
    }

Dears where is the error? Thanks

Answer 1

Add a TreeSelectionListener to your JTree , as shown here . In the listener, update the TableModel of your JTable ; the listening table will update itself accordingly, when your implementation of setValueAt() fires the relent TableModelEvent . Your table model should extend AbstractTableModel , as shown here , and contain a Set<Row> . Your Row class should hold the name and price . If Row implements Comparable<Row> , as shown in the example cited here , then Set<Row> will automatically exclude duplicates when you invoke add() .

Answer 2

如果问题是新的TableModel没有反映在UI中，请使用tableModel.fireTableDataChanged（）。