Spring Boot — convention-over-configuration framework for building Spring-based Java applications
Design and implement a production-grade LLM Gateway in Spring Boot. Covers multi-provider routing, circuit breakers, rate limiting, cost tracking, prompt caching, and tenant isolation — the architecture layer every AI-enabled Java application needs.
A Spring AI 2.0 RAG pipeline on Spring Boot 4.1, taken apart one stage at a time on a real PostgreSQL with pgvector: chunking, once-only PDF ingestion, the similarity threshold that is off by default, injection-proof tenant filters, reranking and answer checks. Every number comes from a committed transcript, and the page says plainly what was scripted.
A step-by-step Java 21 to 25 upgrade guide: Maven and Gradle files, Lombok and Mockito versions, removed and warned APIs, a 12-item checklist and seven AI prompts. Every claim was run on JDK 21, 25, 26 and 27, and the old guide's mistakes are corrected.
A practical guide to the modern Java test stack — JUnit 6 as the runner, AssertJ for fluent assertions, Mockito 5 for mocking, and Testcontainers for real infrastructure. Includes runnable examples for each and AI prompts to generate and refactor tests.
A copy-paste playbook of AI prompts for migrating Java codebases between every LTS jump: 8→11, 11→17, 17→21, and 21→25. Use them in Claude, ChatGPT, Gemini, or Cursor to automate the repetitive parts of a version upgrade.
Learn how to configure Java RMI and Hessian remoting in Spring Boot 2 with RmiServiceExporter, HessianServiceExporter, and their proxy factory beans. Includes server and client configuration, shared interface setup, and a comparison table.
Fix org.hibernate.query.sqm.internal.SqmUtil$NotYetImplementedException in Spring Boot JPA native queries. Covers interface projections, @SqlResultSetMapping, and JPQL constructor expressions with annotated code examples.
Compare Maven Shade Plugin fat JARs, Spring Boot executable JARs, and jpackage native installers — with full Maven configurations, build commands, a side-by-side comparison table, and pitfall guide.
Learn how to create Spring beans using static factory methods with @Bean configuration and XML. Covers third-party class registration, profile-based implementations, construction-time validation, and JUnit testing.
Prepare for your Java interview with the top 40 Spring MVC interview questions and answers covering DispatcherServlet, annotations, REST, validation, exception handling, and more — from beginner to advanced.