Content Library

Java in 2025: LTS Release, AI on JVM, Framework Modernization

Java in 2025 isn't about headline features, it's about how production systems changed under the hood. While release notes focus on individual JEPs, the real story is how the platform, frameworks, and tooling evolved to improve stability, performance, and long-term maintainability. In this video, we look at Java from a production perspective. What does Java 25 LTS mean for teams planning to upgrade? How are memory efficiency, startup time, and observability getting better? Why do changes like Scoped Values and AOT optimizations matter beyond benchmarks? We also cover the broader ecosystem: Spring Boot 4 and Framework 7, AI on the JVM with Spring AI and LangChain4j, Kotlin's growing role in backend systems, and tooling updates that make upgrades easier. Finally, we touch on container hardening and why runtime and supply-chain decisions matter just as much as language features.

I Solved Advent of Code 2025 in Kotlin: Here's How It Went

Every year, Advent of Code spawns thousands of solutions — but few engineers step back to see the bigger picture. This is a complete walkthrough of all 12 days from 2025, focused on engineering patterns rather than puzzle statements. We cover scalable techniques: interval math without brute force, dynamic programming, graph algorithms (JGraphT), geometry with Java AWT Polygon, and optimization problems that need constraint solvers like ojAlgo. You'll see how Java and Kotlin handle real constraints, how visualizations validate assumptions, and when to reach for libraries instead of writing everything from scratch. If you love puzzles, programming—or both—and maybe want to learn how to solve them on the JVM, this is for you.

Java 26 Preview: New JEPs and What They Mean for You

Java 26 is the next feature release that brings features for enhanced performance, security, and developer experience. This video discusses the upcoming JDK 26 release, highlighting ten JEPs including JEP 500. JEP 500 focuses on preparing developers for future restrictions on mutating final fields in Java, emphasizing their role in maintaining immutable state. This is crucial for robust programming and understanding the nuances of mutable vs immutable data, especially concerning an immutable class in java. We also touch upon the broader implications for functional programming in Java.

Liberica JDK: White Paper

Liberica Native Image Kit: White Paper

Liberica JDK 6&7: White Paper

Liberica JDK Perfomance Edition: White Paper

Alpaquita Linux: White Paper

Will AI Replace Developers? A Vibe Coding Reality Check 2025

Can AI replace software engineers? ChatGPT, Copilot, and LLM-powered vibe coding tools promise to automate development—but after testing them against 17 years of production experience, the answer is more nuanced than the hype suggests. Full project generation produces over-engineered code that's hard to refactor. AI assistants excel at boilerplate but fail at business logic. MCP servers solve hallucination problems but create context overload. Meanwhile, DevOps automation actually works. This breakdown separates AI capabilities from marketing promises—essential for teams integrating LLMs and copilots without compromising code quality or architectural decisions.

JRush | Container Essentials: Fast Builds, Secure Images, Zero Vulnerabilities

Web-conference for Java developers focused on hands-on strategies for building high-performance containers, eliminating CVEs, and detecting security issues before production.

Build RAG System with Spring AI: No More AI Lies

Struggling to find answers in your own documentation? Your LLM is too. Hallucinations happen because models don’t know your data. RAG (Retrieval Augmented Generation) turns unstructured docs into searchable vector embeddings, so your LLM retrieves facts instead of inventing them. This tutorial walks through the full RAG workflow in Spring AI: document ingestion with TikaDocumentReader, embedding generation, vector storage (pgvector, Choma, Milvus, Oracle), and similarity-based retrieval. You’ll build two endpoints: one for uploading documents and one for answering questions strictly using your indexed data. When the system doesn’t know, it says so—no more confident nonsense. Designed for Java teams bringing AI into production systems where accuracy matters. You’ll learn the pattern, get the code, and deploy an LLM that finally stops hallucinating.

Hardened Container Images 101: What, Why, and How for DevSecOps [2025]

Why do production containers still ship with 600+ CVEs, package managers, and compilers? Most teams inherit bloated base images without ever checking what’s inside. Hardened container images fix this by removing unnecessary tools, enforcing immutability, and providing verifiable provenance. This tutorial breaks down the four pillars of hardened images—minimal base layers, low-to-zero CVEs, immutable runtimes, and SBOM-backed provenance—and shows how they compare to traditional and distroless images. You’ll also see practical examples: migrating from OpenJDK to hardened Liberica images with multi-stage builds, pinning images by digest, verifying signatures with Cosign, and integrating these checks into a production-ready CI/CD pipeline. Perfect for Java developers, DevOps engineers, and architects who want compliance-ready containers and dramatically fewer CVEs—without reinventing security every sprint.

Cloud Native Spring: Crafting the Perfect Java image for K8S

Spring AI: Streaming LLM Tokens with NDJSON in Spring Boot

Streaming LLM responses smoothly is harder than it looks. SSE often breaks LLM token spacing and words merge. This video shows how to fix it using Spring AI, WebFlux, and NDJSON. You’ll learn why Server-Sent Events can fail with modern LLM tokenizers, how NDJSON provides reliable token streaming, and how to build a production-ready pipeline with proper error handling and backpressure control. We cover configuring Spring AI ChatClient with Ollama, creating a reactive NDJSON endpoint, handling errors with onErrorResume, managing backpressure with limitRate, and consuming the NDJSON stream on a Vaadin frontend using WebClient. The result: stable, clean LLM streaming. Tested with Spring Boot 3.5.7, Java 25 (Liberica JDK), and Ollama both locally and in Docker.

Docker Container Image Security: 13 Best Practices

This video presents 13 practical recommendations for reducing your attack surface and detecting malicious activity more quickly. You’ll learn how to create simple, immutable, and deterministic images using multi-stage builds, distroless bases, and non-root users. We cover SBOM generation with Syft, provenance verification with Cosign, CVE scanning workflows, and secret management strategies. From choosing LTS base images like Alpaquita Linux to implementing host-level protections, these practices will help you confidently deliver secure containers. It’s ideal for Java developers, DevOps engineers, and architects building production-grade infrastructure.

Vaadin Tutorial: From Spring Boot to Beautiful UI Fast

In this guide, I’ll show you how to build a fully functional Java application with authentication, data tables, filters, and a custom cyberpunk theme using Vaadin.

Top 7 JavaFX Testing Mistakes You Need To Avoid!

Stop making these common JavaFX testing mistakes! No more random NullPointerExceptions or deadlocks — in this video, we’ll show you how to fix the 7 most frequent TestFX issues when testing JavaFX applications. Learn how to work with FX threads, integrate with Spring Boot, avoid event-queue race conditions, handle pixel-level test differences, set up headless continuous integration with Monocle, and properly separate business logic from UI tests.

All 7 Java Garbage Collectors Explained

In this complete guide to Java garbage collection, you will learn how the JVM memory model works, understand the differences between the Serial, Parallel, G1, ZGC, Shenandoah, CMS, and Epsilon collectors, and determine which garbage collector is best suited for your application's performance — from single-threaded programs to massive terabyte-scale heaps.

Master Java Profiling in 2025: Tools, Techniques, and Real-World Tips

In this complete guide to Java profiling, you will learn sampling and instrumentation techniques, compare the 7 best tools (JFR, VisualVM, Async Profiler, JProfiler, YourKit, Digma.ai, New Relic), and master how to detect memory leaks and analyze CPU usage.

Should You Still Use LOMBOK in 2025?

Have you ever wondered how @Data, @Builder, and @Getter actually work? Lombok doesn’t just generate code — it rewrites your AST during compilation using internal, unofficial APIs. And while many developers enjoy the reduced boilerplate, few realize the hidden risks behind it.

Turn your 4-second Java startup into 0.5 seconds with GraalVM Native Image

This video covers theory and hands-on practice: how Native Image works, distribution comparison (Liberica NIK, Oracle GraalVM, Mandrel), and real Spring Boot applications including an AI chatbot and Vaadin frontend. From Maven plugins to Docker deployment and tracing agent troubleshooting.

Buildpacks for Spring Boot

Buildpacks for Spring Boot: no Dockerfiles, no hassle — just production-ready container images in one command. Tired of maintaining Dockerfiles? In this tutorial, you’ll learn how to use buildpacks to create optimized Spring Boot containers — fast, secure, and cloud-ready — with just one command. We’ll show what happens under the hood: automatic dependency detection, layered image creation, memory tuning, SBOM generation, and how to tweak builds with just a few plugin options. Need faster startup, smaller image size, or JFR monitoring? Buildpacks can handle it — and we’ll show you how.

Flyway in Spring Boot: Step-by-Step tutorial with Maven

Learn how to use Flyway in Spring Boot with Maven for smooth and reliable database migrations. In this hands-on tutorial, we cover everything from setting up PostgreSQL in Docker, configuring Flyway in your application, writing versioned and repeatable migrations, to using Flyway in CI/CD pipelines with GitHub Actions. Whether you’re new to Flyway or want to master schema version control in Spring Boot, this video will guide you step by step.

Stop Using DTOs – A Cleaner Way for Your Java APIs

Still creating DTOs for every API in your Spring Boot project? You might be overcomplicating things. In this video, we show why DTOs aren’t always necessary and how to replace them with @JsonIgnore, @JsonView, and Jackson Mixins. You’ll see real examples of hiding sensitive fields, creating role-based views, and cutting boilerplate — all while keeping your API safe, clean, and easy to maintain.