what is static ? what is depency injection ? Give me 4 annotation in spring @Autowire how to use it

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Static keyword is used in Java to create class-level variables and methods. Dependency injection is a design pattern used to inject dependencies into a class. @Autowired is a Spring annotation used for automatic dependency injection.

Static keyword is used to create variables and methods that belong to the class itself, rather than to instances of the class.
Dependency injection is a design pattern where the dependencies of a class are provided from the outside, rather than created within the class itself.
Four annotations in Spring: @Component, @Service, @Repository, @Controller.
@Autowired annotation is used to automatically wire dependencies into a Spring bean. Example: @Autowired private UserService userService;

what is static ? what is depency injection ? Give me 4 annotation in spring @Autowire how to use it

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