- What is difference between @bean and @component?
- How are beans defined in Spring boot?
- How are spring beans instantiated?
- How many ways can you make a bean in spring?
- Are Spring beans lazy loaded?
- What is spring bean life cycle?
- How do you create an annotation in a spring bean?
- What is the difference between @bean and @autowired?
What is difference between @bean and @component?
Both approaches aim to register target type in Spring container.
The difference is that @Bean is applicable to methods, whereas @Component is applicable to types.
Therefore when you use @Bean annotation you control instance creation logic in method’s body (see example above).
With @Component annotation you cannot..
How are beans defined in Spring boot?
Spring @Bean annotation tells that a method produces a bean to be managed by the Spring container. It is a method-level annotation. During Java configuration ( @Configuration ), the method is executed and its return value is registered as a bean within a BeanFactory .
How are spring beans instantiated?
Instantiating bean using a constructor The Spring IoC container creates a new bean by calling the default (no-argument) constructor of a class specified by the class attribute of
How many ways can you make a bean in spring?
There are three different ways in which you can define a Spring bean: annotating your class with the stereotype @Component annotation (or its derivatives) writing a bean factory method annotated with the @Bean annotation in a custom Java configuration class.
Are Spring beans lazy loaded?
A bean is loaded only when an instance of that Java class is requested by any other method or a class. xml” spring configuration file is loaded by BeanFactory container class. …
What is spring bean life cycle?
A “Spring bean” is just a Spring managed instantiation of a Java class. The Spring IoC container is responsible for instantiating, initializing, and wiring beans. The container also manages the life cycle of beans. Spring provides several ways through which you can tap into the bean lifecycle.
How do you create an annotation in a spring bean?
@Bean annotation indicates that the annotated method produces a bean to be managed by the Spring container. It is a direct analog of the
What is the difference between @bean and @autowired?
Annotating @Bean only registers the service as a bean(kind of an Object) in spring application context. … Annotating a variable with @Autowired injects a BookingService bean(i.e Object) from Spring Application Context.