Updating data in jtable...

Question

hi everyone,
I have some problem updating data in the jtable, first I get data from database and fill the table in with it...then the table just get disabled...
i have a table called jTable, and a DefaultTableModel wich I applied the jTable with....hope any body could helps...
Thanx
Code:
public class fillDbGui extends JFrame
  Vector colNames = new Vector();
  Vector data = new Vector();
  private DefaultTableModel model = new DefaultTableModel(); 
  private JTable jTable = new JTable(model);
  public  JScrollPane jspVertical;
public void db2vector()
    destroyTable();
    //add database data to vectors
    try
      ResultSet select = conc.executeQuery("SELECT * FROM college ORDER BY id");
      ResultSetMetaData md = select.getMetaData();
      int columns = md.getColumnCount();
      for (int i = 1; i <= columns; i++)
        colNames.addElement( md.getColumnName(i) );
      while (select.next())
          Vector row = new Vector(columns);
          for (int i = 1; i <= columns; i++)
              row.addElement( select.getObject(i) );
          data.addElement(row);
      select.close();
    catch(Exception exc)
      System.out.println(exc.getMessage());
      System.out.println(exc.getStackTrace());
    model.setDataVector(data,colNames);
    jspVertical = new JScrollPane(jTable);    
    getContentPane().add(jspVertical);
  public void destroyTable()
    data.removeAllElements();
    colNames.removeAllElements();
    jspVertical=null;
}

Answer 1

... I only added this constructor to be able to run your code:
    public fillDbGui(){
        setTitle("Fill DB GUI");
        setSize(600,500);
        setLocationRelativeTo(null);
        try{
            DriverManager.registerDriver( new com.mysql.jdbc.Driver() );
            DriverManager.registerDriver( new sun.jdbc.odbc.JdbcOdbcDriver() );
            connection = DriverManager.getConnection(DATABASE_URL, DATABASE_USER, USER_PASSWORD);
            conc = connection.createStatement();
            System.out.println("Successfully connected to database '" +DATABASE_NAME+ "'\n");
        }catch(SQLException ex){
            System.out.println("Connection failed\n");
            JOptionPane.showMessageDialog( this, ex.getMessage(),
                    "Fill_DB_GUI:   SQLException", JOptionPane.ERROR_MESSAGE);
        db2vector();
    public static void main(String args[]) {
        new fillDbGui().setVisible(true);
    private final String DATABASE_NAME = "test";
    private final String DATABASE_URL =  "jdbc:mysql://localhost:3306/" + DATABASE_NAME;
//    private final String DATABASE_URL = "jdbc:odbc:" + DATABASE_NAME;
    private final String TABLE_NAME = "testuhrand";
    private final String DATABASE_USER = "root";
    private final String USER_PASSWORD = "sql";
    private Statement conc;
    private Connection connection;