Thank you so much, and sorry for the very late reply. You can initialize it in multiple ways: 1- Constructor injection: private final PaymentService creditCardPaymentService; private final PaymentService payPalPaymentService; @Autowired public PaymentController(CreditCardPaymentService creditCardPaymentService, PayPalPaymentService payPalPaymentService) { this.creditCardPaymentService = creditCardPaymentService; this.payPalPaymentService = payPalPaymentService; } 2- With qualifiers: @Qualifier("payPalPaymentService") public class PayPalPaymentService extends PaymentService { and then in your controller or other service: private final PaymentService creditCardPaymentService; private final PaymentService payPalPaymentService; @Autowired public PaymentController(@Qualifier("creditCardPaymentService") PaymentService creditCardPaymentService, @Qualifier("payPalPaymentService") PaymentService payPalPaymentService) { this.creditCardPaymentService = creditCardPaymentService; this.payPalPaymentService = payPalPaymentService; }

Hello Miki Szeles , would love to hear your feedback. Hope it helps.

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Hello Miklós Szeles , waiting for your feedback and hope you enjoy reading it.

Appreciate your feedback, Thank you so much

Thank you so much 😊 I will modify the mistake right away.