How to set focus to a invalid cell in setValue method of custom TableModel

Question

I am using a Jtable with an AbstractTableModel. In the setValueAt()
method I do validation of the data entered. If the data is invalid, I
show a dialog box with the error message. The focus goes to the next
cell or wherever it is tabbed out/clicked on. How can I get the
focusto stay in the invalid data cell ?

Answer 1

Thank you all for the help! Definitely extending the DefaultCellEditor is one way.
I am wondering anything can be done from within the setValueAt method, Here is a code snippet i am using for doing validation inside my table model.
public void setValueAt(Object value, int row, int col)
EmployeeDetail empDtls = (EmployeeDetail(empList.elementAt(row));
               switch(col){
               case SSN_COL :
                    if(!GenericValidator.isLong((String)value)){
                    TaxUtil.HAS_ERROR = true;
                    JOptionPane.showMessageDialog(null, "SSN should be numeric only", "Error", JOptionPane.ERROR_MESSAGE);
                    return;
                    if(!GenericValidator.maxLength((String)value,SSN_LEN)){
                    TaxUtil.HAS_ERROR = true;
                    JOptionPane.showMessageDialog(null, "SSN should be of maximum 9 digits only", "Error", JOptionPane.ERROR_MESSAGE);
                    return;
                    empDtls.setSSN((String)value);
                    break;
               case FNAME_COL :
                    if(!GenericValidator.maxLength((String)value,FIRST_NAME_LEN)){
                    TaxUtil.HAS_ERROR = true;
                    JOptionPane.showMessageDialog(null, "First Name should be of maximum 10 characters only", "Error", JOptionPane.ERROR_MESSAGE);
                    return;
                    empDtls.setFirstName((String)value);
                         break;
               }