Spring IoC Container

1) Spring IoC container forms the core of the Java Spring Framework.
2) It is responsible for instantiating, configuring and managing the beans in your spring application.
3) It uses configuration metadata to manage the beans.
4) Configuration metadata can be supplied through XML file or through Java annotations or through Java Code.
5) It uses configuration metadata and POJO classes to set up an application ready for use.

See more at https://javaconceptoftheday.com/spring-ioc-container/