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Spring Boot Hello World Tutorial with Lombok and H2 Database – Quick Start for Beginners

Learn how to create a Hello World Spring Boot application using Lombok for cleaner code and the H2 in-memory database for rapid development. This step-by-step guide includes annotations, project setup, REST API, H2 console access, and more to kickstart your Spring Boot journey.

Spring Boot Hello World Tutorial with Lombok and H2 Database – Quick Start for Beginners
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NoSuchBeanDefinitionException: The Most Common Spring Bean Error

Learn how to fix NoSuchBeanDefinitionException in Spring Boot with clear examples and best practices for dependency injection, package scanning, and bean registration.

NoSuchBeanDefinitionException for a missing bean in the ApplicationContext.
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BeanCurrentlyInCreationException: Circular Dependencies in Spring

Spring Boot’s DI can backfire with the dreaded BeanCurrentlyInCreationException, signaling an unresolvable circular dependency. Learn why cycles occur, how they breach SOLID principles, and three fixes—refactor to break loops, use @Lazy injection, and static @Bean factory methods—to restore startup.

Circular dependencies in Spring causing a BeanCurrentlyInCreationException