private boolean addBrand() throws ClassNotFoundException, SQLException {
String brandId = brandIdTextField.getText();
String brand = brandTextField.getText();
if (brand.isEmpty()) {
JOptionPane.showMessageDialog(this, "Brand type can't be empty");
isBrandEmpty = true; // isBrandEmpty->true when brandTextField is empty
return false;
} else {
isBrandEmpty = false; // //isBrandEmpty->false when brandTextField is not empty
}
return BrandController.addBrandCategory(new Brand(brandId, brand));
}
