Using @Autowired in the spring main application

I created a spring project and in here I implement the command line runner as the application I create need to be run on the console. So inside the run method I created an object of another class and called the method for executing the application.<br>

So when creating the object I had to make it Autowired and the relevant class a Component.<br>
Is it a good coding way to do code or is there any other way to avoid the null pointer exception.<br>

And my knowledge on why I put the Autowired is not 100% certain, I think Autowired keyword injects the beans of the class Menu so the methods and variables of that class can be called. Is it correct ?

Main Class

    @SpringBootApplication
    public class DemoApplication implements CommandLineRunner {

	@Autowired
	private Menu obj;

	public static void main(String[] args) {
		SpringApplication.run(DemoApplication.class, args);
	}

	@Override
	public void run(String... args) throws Exception {
		obj.start();
	}
    }

Menu Class

    @Component
    public class Menu {
        
        public void start(){
            //implementation 
        }
    }

I think this much better

@SpringBootApplication
public class DemoApplication extends SpringBootServletInitializer {

    @SuppressWarnings("resource")
    public static void main(final String[] args) {
        ConfigurableApplicationContext context = SpringApplication.run(DemoApplication, args);

        context.getBean(Menu).start(); // <-- here
    }
}

Hope useful

I think you can use @PostConstruct annotation over a method instead of command line runner to execute code after running the application.

example:

@PostConstruct
public void init(){
   obj.start();
// or any code that use @autowired injection
}