Update JTable cells in real time

You can try this way to do it where you create an object of a table and within this object is the function of cell editing where you send the row and column with a button to activate the functionality

public class TestTabla {

boolean bandera = false;

public void create() {
    JTable tabla = new JTable(2, 2) {

       public boolean isCeldaEditable(int fila, int columna) {
            if (bandera) {
                return false;
            }
            return true;
        }
    };
    JFrame f = new JFrame();
    JButton boton = new JButton("Disable");
    boton.addActionListener(new ActionListener() {

        public void actionPerformed(ActionEvent e) {
            bandera = true;
        }
    });
    f.setLayout(new FlowLayout());
    f.add(new JScrollPane(tabla));
    f.add(boton);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setVisible(true);
}

public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {

        public void run() {
            new TestTable().create();
        }
    });
}