JTable's setValueAt() function -URGENT please help!!!

Question

I am using a subclass of the DefaultTableModel for my JTable. The data is in the form of a Vector of vectors. I am catching user input (editing) by implementing the setValueAt() function. The table consists of 1 row, and 4 columns (thats a required limitation). When I edit(change) only one cell of the table, and dont tab out of the cell, I see that the setValueAt() function is not being called, and the model is not being updated. But when I change the cell value and tab out of the cell to the next cell, the setValueAt() function is being called.
How can I force the setValueAt() function to be called without tabbing out of the edited cell. I need to implement this feature as a user can change a single cell and click the "save" button.
here is the setValueAt() function implementation.. Could it be that I might have implemented this in error or need to implement some other methods? Any help/pointers will be greatly appreaciated.
public void setValueAt(Object value, int row, int col)
String cellValue = "";
     if (value instanceof String)
          cellValue = (String)value;
     Vector tmp = (Vector)dataVector.elementAt(row);
     tmp.setElementAt(cellValue,col);
     fireTableCellUpdated(row,col);
Thank You in advance

Answer 1

Seems to me that the problem is to do with when setValueAt() gets called.
Sounds like you want it to be called when the Cell's editor loses focus.
One solution would be something like the following to ensure editing stops when focus is lost.
There may be other less complicated solutions, but this one should work !
class  MyEditor extends AbstractCellEditor implements TableCellEditor {
    public MyEditor() {
        this.text = new JTextField();
        this.text.addFocusListener(new FocusListener() {
            public void focusGained(FocusEvent e) {
            public void focusLost(FocusEvent e) {
                stopCellEditing();
    public Component getTableCellEditorComponent(JTable table, Object value,
                                                                           boolean isselected, int row, int col) {
        this.text.setText((String)value);
        return this.text;
    public Object getCellEditorValue() {
        return this.text.getText();
    private JTextField text;
table.setDefaultEditor(String.class, new MyEditor());