Former senior programmer at a Fortune Global 500 company, dedicated to sharing Java expertise. Visit Feng's site: Java Knowledge Sharing, www.java1234.com
This article analyzes Apache PDFBox 3's major improvements over 2.x, including the new Loader API, incremental parsing for memory efficiency, rewritten IO layer with java.nio, and cleaner APIs, while providing practical code examples for loading PDFs, extracting text, and generating documents.
This article explores Quarkus's AI integration via the LangChain4j extension, demonstrating declarative AI services, function calling with tools, retrieval-augmented generation (RAG), and Model Context Protocol (MCP) support, all while retaining Quarkus's cloud-native benefits like fast startup and native compilation.
Java 27 introduces four final features: G1 becomes the universal default garbage collector, compact object headers reduce memory overhead by 4 bytes per object, TLS 1.3 adds post-quantum hybrid key exchange by default, and JFR automatically redacts sensitive data like passwords and tokens before recording.
This article analyzes five major paradigm shifts in large model post-training over the past six months, covering expert distillation, online distillation as RL alternative, RLVR refinements, SFT-RL distribution mismatch, and data quality as irreducible constraint, with specific papers and metrics.
A hands-on guide to iText 9 for Java developers, covering new PDF 2.0 encryption (AES-GCM, PDF MAC), digital signature verification, PDF/A/UA compliance, Maven setup, and practical code for text extraction, page-by-page parsing, and image export.
This article details a full-stack crop disease detection system using YOLO26 for object detection, FastAPI for backend services, and Vue3 for the frontend, covering architecture, database design, API endpoints, business logic, and deployment configuration.
This article details MyBatis-Plus 3.5.15's new support for Spring Boot 4.0 and Jackson 3.0, providing step-by-step migration guidance including starter dependency changes, JSON field handling with Jackson3TypeHandler, and common upgrade pitfalls like starter mismatches and factoryBeanObjectType errors.
Apache Geode 2.0, released in January 2026, upgrades the in‑memory data grid to require JDK 17, migrate all Java EE packages to Jakarta EE 10, align with Spring 6, and provides detailed upgrade steps, code examples, and pitfalls to avoid.
This article introduces YOLO26, a new NMS‑free, lightweight computer‑vision model from Ultralytics, details its architecture, training innovations, performance benchmarks, multi‑task capabilities, and provides a step‑by‑step Python tutorial for installing the library, running a Hello‑World inference, and interpreting the detailed latency breakdown.
Jakarta EE, the rebranded Java EE now governed by the Eclipse Foundation, offers open standards, built‑in enterprise capabilities, cloud‑native improvements, a smooth upgrade path for legacy systems, and familiar APIs, making it an attractive alternative to Spring for long‑term, maintainable applications.
