Spring Boot CommandLineRunner example:

import org.springframework.boot.CommandLineRunner;

@SpringBootApplication
public class StartBookApplication implements CommandLineRunner {
    public static void main(String[] args) {
        SpringApplication.run(StartBookApplication.class, args);
    }

    @Override
    public void run(String... args) throws Exception {
        System.out.println("run any method here >>> ");
        //run any method here >>>
    }
}