What is a configuration class in Java?

The central artifact in Spring’s new Java-configuration support is the @Configuration -annotated class. These classes consist principally of @Bean -annotated methods that define instantiation, configuration, and initialization logic for objects that are managed by the Spring IoC container.

What is a config file Java?

properties is a file extension for files mainly used in Java related technologies to store the configurable parameters of an application. They can also be used for storing strings for Internationalization and localization; these are known as Property Resource Bundles.

Where is Java configuration file?

System Runtime Configuration File

1. Windows: \%ALLUSERSPROFILE\%\Oracle\Java\java.settings.cfg.
2. macOS: /Library/Application/Support/Oracle/Java/java.settings.cfg.

What is the difference between @component and @configuration?

The main difference between these annotations is that @ComponentScan scans for Spring components while @EnableAutoConfiguration is used for auto-configuring beans present in the classpath in Spring Boot applications.

Why do we need configuration in Java?

@Configuration annotation indicates that a class declares one or more @Bean methods and may be processed by the Spring container to generate bean definitions and service requests for those beans at runtime. This is called Spring Java Config feature (using @Configuration annotation).

What is @RequestMapping and @GetMapping?

@GetMapping is a composed annotation that acts as a shortcut for @RequestMapping(method = RequestMethod. GET) . @GetMapping is the newer annotaion. It supports consumes.

How read config file in Java?

How to read config. properties file:

1. Create a java class named ReadPropertyFile. java inside the same project where config. properties file is created → include “public static main” method and Finish.
2. First we have to create object of Properties class.

What is Commons configuration?

The Commons Configuration software library provides a generic configuration interface which enables a Java application to read configuration data from a variety of sources. Configuration parameters may be loaded from the following sources: Properties files. XML documents.

Why do we use @configuration?

1. Spring @Configuration annotation usage. Use @Configuration annotation on top of any class to declare that this class provides one or more @Bean methods and may be processed by the Spring container to generate bean definitions and service requests for those beans at runtime.

What is the use of configure?

verb (used with object), con·fig·ured, con·fig·ur·ing. to design or adapt to form a specific configuration or for some specific purpose: The planes are being configured to hold more passengers in each row. Computers.