private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        try {
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
            Connection conexion = DriverManager.getConnection("jdbc:sqlserver://localhost:1434;databaseName=nombreBaseDeDatos;user=nombreUsuario;password=contraseña;");
            JOptionPane.showMessageDialog(this, "conexion satisfactoria");
            conexion.close();
        } catch (SQLException e) {
            JOptionPane.showMessageDialog(null, e.getMessage());
        } catch (ClassNotFoundException e) {
            JOptionPane.showMessageDialog(null, e.getMessage());
        }
    }