Help with Java Table

Question

Hi
Does anyone have a code sample for JTable, i need to have following functions
1, This table has only 1 column
2, When user double clicks on row, he must be able to edit, with maximum length of 60 characters
3, A button which the user can click to say add row, this will add a emply row and user can double click to edit it
4, When user clicks on apply button, read all the rows and get the data from there and update a database
Any help would be appreciated
Ashish

Answer 1

Hi
I have this code, but after i add new row, i am not able to edit the new row, any suggestion to get it working
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;
import java.awt.*;
import java.awt.event.*;
public class TestAddRowInTable extends JFrame
    private JTable table;
    private MyModel model;
    private Vector allData;
    public TestAddRowInTable()
        super("my Table");
        buildData();
        Container cont = this.getContentPane();
        cont.setLayout(new BorderLayout());
        cont.add(getTablePane(), BorderLayout.NORTH);
        cont.add(getButtonPanel(), BorderLayout.SOUTH);
        this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        this.setSize(550,400);
        this.show();
    private JScrollPane getTablePane()
        table = getTable();
        JScrollPane scrollPane = new JScrollPane(table);
        table.setPreferredScrollableViewportSize(new Dimension(550, 310));
        scrollPane
                .setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        scrollPane
                .setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
        return scrollPane;
    private JTable getTable()
          Vector header = new Vector();
          header.add("Notes");
        model = new MyModel(allData, header);
        JTable table = new JTable(model);
        table.getTableHeader().setReorderingAllowed(false);
        table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
        for (int i = 0; i < model.getColumnCount(); i++)
            TableColumn column1 = table.getColumnModel().getColumn(i);
            switch (i)
            case 0:
                column1.setPreferredWidth(530);
                column1.setCellEditor(new JTextFieldEditor(new JTextField(60)));
                continue;
        return table;
    private JPanel getButtonPanel()
        JPanel buttonPanel = new JPanel();
        buttonPanel.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5));
        buttonPanel.setPreferredSize(new Dimension(550, 30));
            JButton addButton = new JButton("Add Row");
            JButton changeButton = new JButton("Apply");
            addButton.addActionListener(new ActionListener()
                public void actionPerformed(ActionEvent e)
                    model.addRow(new Vector());
            buttonPanel.add(addButton);
            buttonPanel.add(changeButton);
        return buttonPanel;
    class JTextFieldEditor extends DefaultCellEditor implements ItemListener
        JComponent component;
        int row, column;
        public JTextFieldEditor(JTextField textField)
            super(textField);
            component = textField;
        public Component getTableCellEditorComponent(JTable table,
                Object value, boolean isSelected, int row, int column)
            this.row = row;
            this.column = column;
            ((JTextField) component).setText(value.toString());
            return component;
        public Object getCellEditorValue()
            Vector data1 = (Vector) allData.get(row);
            data1.set(column, ((JTextField) component).getText());
            return ((JTextField) component).getText();
        public void itemStateChanged(ItemEvent e)
            super.fireEditingStopped();
    class MyModel extends DefaultTableModel
            public MyModel(Vector allData, Vector header)
                super(allData, header);
            public Object getValueAt(int row, int col)
               // if (row==0)
                 //   return prop_names[row];
                return super.getValueAt(row,col);
           public boolean isCellEditable(int row, int col)
              //  if (col==0)
               ///     return false;
                return true;
    private void buildData()
        allData = new Vector();
        Vector data = new Vector();
        data.add("This is note one");
        allData.add(data);
    public static void main(String args[])
        new TestAddRowInTable();
}