I have a problem in java when executing an sql query to show records in a jtable

This problem occurs to me with this method to show data from a bd in java, because it tells me that the query did not generate any results when I saved in my form and I need to save and that immediately I show the record, this code shows it but I have to get out of the project and go back to see the records and what I want is that when entering is shown immediately, I would appreciate the answer

void MostrarDatos(){
    DefaultTableModel modelo=new DefaultTableModel();
    modelo.addColumn("Rif");
    modelo.addColumn("Cedula");
    modelo.addColumn("Nombre");
    modelo.addColumn("Apellido");
    modelo.addColumn("Telefono");
    modelo.addColumn("TR");
    modelo.addColumn("TC");
    modelo.addColumn("Direccion");
    datalistado.setModel(modelo);
    String []datos = new String [8];
    try {
        PreparedStatement ps = cn.prepareStatement("SELECT * FROM cliente");
        ResultSet rs = ps.executeQuery();
        while(rs.next()){
            datos[0]=rs.getString(1);
            int IDENTIFICADOR = (int)rs.getInt(2);
            String NUMERODEIDENTIFICADOR =                 String.valueOf(IDENTIFICADOR);
            datos[1]=NUMERODEIDENTIFICADOR;
            datos[2]=rs.getString(3);
            int TELEFONO = (int)rs.getInt(5);
            String NUMERODETELEFONO = String.valueOf(TELEFONO);
            datos[4]=NUMERODETELEFONO;
            datos[5]=rs.getString(6);
            datos[6]=rs.getString(7);
            datos[7]=rs.getString(8);
            modelo.addRow(datos);
        }   
        datalistado.setModel(modelo);
    } catch (SQLException ex) {
        Logger.getLogger(Clientes.class.getName()).log(Level.SEVERE, null, ex);
    }
}