In which cases is it better to use Java configuration instead of other configuration methods in an application?

Java configuration (using classes with @Configuration annotations and methods with @Bean) is preferred in the following cases:

• When a flexible and programmable configuration is needed, which is difficult to express in XML or properties files.
• For dynamic creation of beans with logic dependent on conditions at runtime.
• When there is a need to use the benefits of type safety and IDE auto-completion, which facilitates maintenance and refactoring.
• If the project is aimed at minimizing the use of XML and strives for a more modern style of configuration.
• For integration with other Java code, where it is convenient to call methods and use objects directly.

Example of Java configuration:

@Configuration
public class AppConfig {
    @Bean
    public MyService myService() {
        return new MyServiceImpl();
    }
}