Spring. Inversion of Control with Annotations.

 <?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context.xsd">

   <!-- add entry to enable component scanning -->
   <context:component-scan base-package="com.example.demo"/>

</beans>

package com.example.demo;

public interface Coach {

    public String getDailyWorkout();

}
package com.example.demo;

import org.springframework.stereotype.Component;

@Component
public class TennisCoach implements Coach{

    @Override
    public String getDailyWorkout() {
        return "Practice your backhand volley";
    }
}
package com.example.demo;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class AnnotationDemoApp {
    public static void main(String[] args) {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        Coach coach = context.getBean("tennisCoach", Coach.class);
        System.out.println(coach.getDailyWorkout());
        context.close();
    }
}