NITEU DEV BLOGDeveloper tech blog — programming tutorials, OS tips, and 30-day courseshttps://dev.niteu.com/enWriting Your Own Claude Code Skill / Agenthttps://dev.niteu.com/posts/ai/claude-code-skills-agents-guide/https://dev.niteu.com/posts/ai/claude-code-skills-agents-guide/Frontmatter rules and practical examples for authoring custom SKILL.md files and subagent definitions.Fri, 24 Apr 2026 14:50:00 GMTaiclaude-codeagentskillClaude Code Skill / Agent -- Overview and How They Workhttps://dev.niteu.com/posts/ai/claude-code-skills-agents-overview/https://dev.niteu.com/posts/ai/claude-code-skills-agents-overview/What Claude Code Skills and Subagents are, how they work internally, and when to reach for each.Fri, 24 Apr 2026 14:40:00 GMTaiclaude-codeagentskillJDK 26 Key Features — HTTP/3 Support and 15% G1 GC Throughput Boosthttps://dev.niteu.com/posts/jdk-release/jdk26-features/https://dev.niteu.com/posts/jdk-release/jdk26-features/An overview of Java 26's HTTP/3 client, G1 GC throughput improvement, AOT cache expansion, and other latest changes.Thu, 09 Apr 2026 10:00:00 GMTjavajdk26http3g1-gcJDK 25 Key Features — The Fifth LTS, Compact Source Files and Compact Headershttps://dev.niteu.com/posts/jdk-release/jdk25-features/https://dev.niteu.com/posts/jdk-release/jdk25-features/An overview of Java 25 LTS with compact source files, Scoped Values, Compact Object Headers, and other key features.Thu, 09 Apr 2026 09:00:00 GMTjavajdk25ltscompact-sourcescoped-valuesJDK 24 Key Features — Stream Gatherers Finalized and a Record 24 JEPshttps://dev.niteu.com/posts/jdk-release/jdk24-features/https://dev.niteu.com/posts/jdk-release/jdk24-features/An overview of Java 24's Stream Gatherers, Virtual Thread pinning fix, quantum-resistant cryptography, and 24 total JEPs.Thu, 09 Apr 2026 08:00:00 GMTjavajdk24stream-gatherersquantum-resistantJDK 23 Key Features — Markdown Javadoc and ZGC Generational Defaulthttps://dev.niteu.com/posts/jdk-release/jdk23-features/https://dev.niteu.com/posts/jdk-release/jdk23-features/An overview of Java 23's Markdown documentation comments, ZGC Generational default switch, Module Import preview, and more.Thu, 09 Apr 2026 07:00:00 GMTjavajdk23markdown-javadoczgcJDK 22 Key Features — Unnamed Variables and Launch Multi-File Programshttps://dev.niteu.com/posts/jdk-release/jdk22-features/https://dev.niteu.com/posts/jdk-release/jdk22-features/An overview of Java 22's finalized Unnamed Variables, Multi-File Source execution, Stream Gatherers preview, and more.Thu, 09 Apr 2026 06:00:00 GMTjavajdk22unnamed-variablesstream-gatherersJDK 21 Key Features — The Fourth LTS and Java's Biggest Update Everhttps://dev.niteu.com/posts/jdk-release/jdk21-features/https://dev.niteu.com/posts/jdk-release/jdk21-features/A comprehensive overview of Java 21 LTS with Virtual Threads, Record Patterns, Sequenced Collections, and 15 total JEPs.Thu, 09 Apr 2026 05:00:00 GMTjavajdk21ltsvirtual-threadspattern-matchingJDK 20 Key Features — Record Patterns Improvements and Scoped Valueshttps://dev.niteu.com/posts/jdk-release/jdk20-features/https://dev.niteu.com/posts/jdk-release/jdk20-features/An overview of Java 20's Record Patterns improvements, Scoped Values, Virtual Threads second preview, and more.Thu, 09 Apr 2026 04:00:00 GMTjavajdk20record-patternsscoped-valuesJDK 19 Key Features — The Debut of Virtual Threads and Structured Concurrencyhttps://dev.niteu.com/posts/jdk-release/jdk19-features/https://dev.niteu.com/posts/jdk-release/jdk19-features/An overview of Virtual Threads, Structured Concurrency, and Record Patterns introduced as previews in Java 19.Thu, 09 Apr 2026 03:00:00 GMTjavajdk19virtual-threadsstructured-concurrencyJDK 18 Key Features — UTF-8 Default and Simple Web Serverhttps://dev.niteu.com/posts/jdk-release/jdk18-features/https://dev.niteu.com/posts/jdk-release/jdk18-features/An overview of Java 18's UTF-8 default encoding, built-in web server, Javadoc code snippets, and more.Thu, 09 Apr 2026 02:00:00 GMTjavajdk18utf-8web-serverJDK 17 Key Features — Sealed Classes Finalized and the Third LTShttps://dev.niteu.com/posts/jdk-release/jdk17-features/https://dev.niteu.com/posts/jdk-release/jdk17-features/An overview of Java 17 LTS with Sealed Classes, pattern matching switch preview, random generator improvements, and more.Thu, 09 Apr 2026 01:00:00 GMTjavajdk17sealed-classesltsJDK 16 Key Features — Records Finalized and instanceof Pattern Matchinghttps://dev.niteu.com/posts/jdk-release/jdk16-features/https://dev.niteu.com/posts/jdk-release/jdk16-features/An overview of Java 16's finalized Records, Pattern Matching for instanceof, Stream.toList(), and more.Wed, 08 Apr 2026 10:00:00 GMTjavajdk16recordpattern-matchingJDK 15 Key Features — Sealed Classes and ZGC Production Readyhttps://dev.niteu.com/posts/jdk-release/jdk15-features/https://dev.niteu.com/posts/jdk-release/jdk15-features/An overview of Java 15's Sealed Classes, Text Blocks finalization, ZGC/Shenandoah production readiness, and more.Wed, 08 Apr 2026 09:00:00 GMTjavajdk15sealed-classeszgcJDK 14 Key Features — Records, Pattern Matching, and Helpful NPE Messageshttps://dev.niteu.com/posts/jdk-release/jdk14-features/https://dev.niteu.com/posts/jdk-release/jdk14-features/An overview of Java 14's Record classes, instanceof pattern matching, Helpful NullPointerExceptions, and more.Wed, 08 Apr 2026 08:00:00 GMTjavajdk14recordpattern-matchingJDK 13 Key Features — Text Blocks and ZGC Improvementshttps://dev.niteu.com/posts/jdk-release/jdk13-features/https://dev.niteu.com/posts/jdk-release/jdk13-features/An overview of Java 13's Text Blocks preview, Switch Expressions improvements, ZGC memory return, and more.Wed, 08 Apr 2026 07:00:00 GMTjavajdk13text-blockszgcJDK 12 Key Features — Switch Expressions and Shenandoah GChttps://dev.niteu.com/posts/jdk-release/jdk12-features/https://dev.niteu.com/posts/jdk-release/jdk12-features/An overview of Java 12's Switch Expressions preview, Shenandoah GC, microbenchmarks, and other major changes.Wed, 08 Apr 2026 06:00:00 GMTjavajdk12switchgcJDK 11 Key Features — HTTP Client, String Enhancements, and the Second LTShttps://dev.niteu.com/posts/jdk-release/jdk11-features/https://dev.niteu.com/posts/jdk-release/jdk11-features/A guide to the core features of Java 11: the HTTP Client API, new String methods, file utilities, and more from this LTS release.Wed, 08 Apr 2026 05:00:00 GMTjavajdk11http-clientltsJDK 10 Key Features — The var Keyword and G1 GC Parallel Processinghttps://dev.niteu.com/posts/jdk-release/jdk10-features/https://dev.niteu.com/posts/jdk-release/jdk10-features/A guide to the core changes in Java 10: local variable type inference (var), G1 GC Parallel Full GC, and more.Wed, 08 Apr 2026 04:00:00 GMTjavajdk10vargcJDK 9 Key Features — The Module System and the Arrival of JShellhttps://dev.niteu.com/posts/jdk-release/jdk9-features/https://dev.niteu.com/posts/jdk-release/jdk9-features/An overview of the major changes in Java 9: the module system (Jigsaw), JShell, collection factory methods, and more.Wed, 08 Apr 2026 03:00:00 GMTjavajdk9modulejshellJDK 8 Key Features — Lambda, Streams, and the Dawn of a New Erahttps://dev.niteu.com/posts/jdk-release/jdk8-features/https://dev.niteu.com/posts/jdk-release/jdk8-features/A practical guide to the core features introduced in Java 8: Lambda, Stream API, Optional, and the Date/Time API.Wed, 08 Apr 2026 02:00:00 GMTjavajdk8lambdastream-apiMCP Server Building Guide -- Spring Boot Editionhttps://dev.niteu.com/posts/ai/mcp-spring-boot-guide/https://dev.niteu.com/posts/ai/mcp-spring-boot-guide/How to build an MCP server with Spring AI, define Tools and Resources, and connect them to AI.Sun, 05 Apr 2026 01:00:00 GMTaimcpjavaspring-bootMCP Server Building Guide -- Python Editionhttps://dev.niteu.com/posts/ai/mcp-python-guide/https://dev.niteu.com/posts/ai/mcp-python-guide/How to implement Tools, Resources, and Prompts with Python FastMCP using the Model Context Protocol.Sat, 04 Apr 2026 05:00:00 GMTaimcppythonLLMComplete Guide to Java 21 Virtual Threadshttps://dev.niteu.com/posts/java/virtual-threads/https://dev.niteu.com/posts/java/virtual-threads/A practical guide to Virtual Threads introduced in Java 21 — concepts, usage, and pitfalls.Fri, 03 Apr 2026 02:00:00 GMTjavavirtual-threadsconcurrencyjava212026 LLM Model Comparison: System Specs and Use Cases by Sizehttps://dev.niteu.com/posts/ai/latest-llm-models-spec/https://dev.niteu.com/posts/ai/latest-llm-models-spec/A side-by-side comparison of major LLM parameters, VRAM, and GPU requirements.Thu, 02 Apr 2026 00:00:00 GMTaiLLMopenaiGPUEssential Glossary for Requesting Web Development from AIhttps://dev.niteu.com/posts/ai/web-dev-ai-glossary/https://dev.niteu.com/posts/ai/web-dev-ai-glossary/Standard terminology organized by domain for clear communication with AI in web development.Sat, 28 Mar 2026 01:00:00 GMTaiwebglossaryprompt2025 Web Development Trends: HTML Tag Usage and Layout Terminologyhttps://dev.niteu.com/posts/web/modern-web-dev-trends/https://dev.niteu.com/posts/web/modern-web-dev-trends/HTML tag usage statistics, semantic tag adoption rates, and layout terminology overview.Fri, 27 Mar 2026 02:00:00 GMThtmlcsswebfrontendaccessibilityPractical Guide to LLM Fine-Tuning: From LoRA to SFThttps://dev.niteu.com/posts/ai/fine-tuning-guide/https://dev.niteu.com/posts/ai/fine-tuning-guide/Core concepts of fine-tuning through practical LoRA/QLoRA code examples.Wed, 25 Mar 2026 02:00:00 GMTaiLLMfine-tuningLoRAConda Installation and Usage Guide — The Standard for Python Environment Managementhttps://dev.niteu.com/posts/python/conda-guide/https://dev.niteu.com/posts/python/conda-guide/Covers Miniconda installation, virtual environment creation, package management, and differences from pip.Tue, 24 Mar 2026 06:00:00 GMTpythoncondavirtual-environmentpackage-managementA Practical Guide to Prompt Engineeringhttps://dev.niteu.com/posts/ai/prompt-engineering-guide/https://dev.niteu.com/posts/ai/prompt-engineering-guide/Key prompting techniques for getting the responses you want from LLMs.Sun, 22 Mar 2026 05:00:00 GMTaiLLMpromptlangchain