Spring -Configuration (JavaConfig)

 There are many ways to configure a spring application. like XML based configuration.

JAVA Configuration is the most currently used spring configuration, because of various benefits it provides like-

- Native language syntax

- compile time checking of configuration.

- easier IDE integration.

Annotating a class with @Configuration indicates that the class can be used by the Spring IoC container as a source of bean definition.

@Bean annotation tells spring that a method annotated with @Bean annotation should be registered as a bean in the application context.

e.g.

@Configuration
public class HelloWorldConfig {
   @Bean 
   public HelloWorld helloWorld(){
      return new HelloWorld();
   }
}

@Bean annotation tells the spring that the method will return an object that should be registered as a bean in Spring Application Context