Displaying row numbers in tables

Question

Is there a way to get JTable to display row numbers on the left-most side of the table? Are there any functions in JTable that will allow you to do this?
I am thinking that to do this, I will probably need to add a column to my table model and make the first column and uneditable JLabel that shows the row number.
Thanks for any help.
Mike Ryan

Answer 1

Ok , the class i am pulling this code from is 500+ lines of code, so I will try to pull out only the important pieces.
private DefaultTableModel theNorthernModel;
private JTable theNorthernTable;
private DefaultTableCellRenderer[] theRenderer;
private JScrollPane theNorthernPane;
private Object[] rowTitles = {"1", "2", "3",  "4", "5",  "6", "7"};//
private Object[] colTitles  = {"one","two","three","four","five","six"};
     theNorthernModel = new DefaultTableModel(rowTitles.length,colTitles.length);
          theNorthernTable = new JTable(theNorthernModel);
          theNorthernTable.setCellSelectionEnabled(false);
          theNorthernTable.setEnabled(false);
          theNorthernTable.getTableHeader().setReorderingAllowed(false);
          theNorthernPane  = new JScrollPane(theNorthernTable);
          theNorthernPane.setPreferredSize(new Dimension(600, 150));
//this is the stuff you want          
ListModel listModel = new AbstractListModel() {
             public int getSize() {
                     return rowTitles.length;
            public Object getElementAt(int index) {
                 return rowTitles[index];
        JList rowHeader1 = new JList(listModel);
        rowHeader1.setBackground(theNorthernPane.getBackground());
        rowHeader1.setFixedCellWidth(140);
        theNorthernPane.setViewportView(theNorthernTable);
        theNorthernPane.setRowHeaderView(rowHeader1);
        rowHeader1.setCellRenderer(new RowHeaderRenderer(theNorthernTable));
theRenderer = new DefaultTableCellRenderer[6];
          for(int i = 0; i< 6; i++) {
               theRenderer[i] = new DefaultTableCellRenderer();     
theColumnModel = (DefaultTableColumnModel)theNorthernTable.getColumnModel();
* RowHeaderRenderer renders the panel's rows
class RowHeaderRenderer extends JLabel implements ListCellRenderer {
     * Constructor creates all cells the same
     * To change look for individual cells put code in
     * getListCellRendererComponent method
    RowHeaderRenderer(JTable table) {
        JTableHeader header = table.getTableHeader();
        setOpaque(true);
        setBorder(UIManager.getBorder("TableHeader.cellBorder"));
        setHorizontalAlignment(CENTER);
        setForeground(header.getForeground());
        setBackground(header.getBackground());
        setFont(header.getFont());
     * Returns the JLabel after setting the text of the cell
    public Component getListCellRendererComponent( JList list,
    Object value, int index, boolean isSelected, boolean cellHasFocus) {
        setText((value == null) ? "" : value.toString());
        return this;
}