How to inject parent primitive type property through child class constructor when componentscan is enabled - spring

Question

I have a parent class Car & a sub class Axio. So, i'm trying to pass an argument through super("Axio") within child constructor to constructor parameter in the parent class which then assign the value into a property defined within the parent class. When i try executing the application in spring boot it throws me an exception stating
Description:
Field car in com.test.efshop.controller.HelloController required a bean of type 'com.test.efshop.Axio' that could not be found.
Action:
Consider defining a bean of type 'com.test.efshop.Axio' in your configuration.
Can anyone please tell me how to achieve this in spring boot?. My Code is as below,
// Car class
package com.test.efshop;
public class Car {
private String carName;
public String getCarName() {
return carName;
}
public void setCarName(String carName) {
this.carName = carName;
}
public Car(String carName) {
this.carName = carName;
}
public String print() {
return "Car name is : "+carName;
}
}
//sub class of car class which is Axio
package com.test.efshop;
public class Axio extends Car{
public Axio() {
super("Axio");
}
}
//main method
package com.test.efshop;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.support.SpringBootServletInitializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;
#SpringBootApplication
public class DemoApplication extends SpringBootServletInitializer {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
//controller class
package com.test.efshop.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;
import com.test.efshop.Axio;
import com.test.efshop.Engine;
#Controller
public class HelloController {
#Autowired
private Axio car;
#RequestMapping(value = "/hello")
public ModelAndView print() {
return new ModelAndView("index");
}
//This is the method which i used to return the value of Car class
#RequestMapping(value = "/hello2")
#ResponseBody
public String print2() {
return car.print();
}
}

Answer 1

As pvpkiran commented, you can't #Autowire a class if it's not a Spring bean.
Option a) you convert the Axio class into a service or component.
#Component
public class Axio extends Car {
public Axio() {
super("Axio");
}
}
Option b) you define a bean of type Axio.
#SpringBootApplication
public class DemoApplication extends SpringBootServletInitializer {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
#Bean
public Axio myAxioBean() {
return new Axio();
}
}