Content Library

Cloud Native Spring: Crafting the Perfect Java image for K8S

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.

GraalVM for Java Developers: The Ultimate Beginner’s Guide

What is GraalVM and how can it improve your Java applications? In just 10 minutes, this video explains the three main components of GraalVM — the JIT compiler, Native Image, and Polyglot API. Learn how to boost performance, reduce startup time, and combine multiple languages in one app. Whether you’re building microservices, serverless apps, or just exploring modern JVM tooling, this is your quick-start guide to GraalVM.

Java 25 LTS: The New Features in JDK 25

In this video, we go through every single JEP in JDK 25, explaining what it does, why it matters, and how it impacts real-world development. Whether you’re a Java veteran or just getting started, this breakdown will help you stay ahead of the curve.

Java Downgrade Challenge: From JDK 8 to 1.1 (Part 2)

In Part 2 of the Java Downgrade Challenge, we continue our journey — now from Java 8 all the way to Java 1.1. No streams, no lambdas, no generics, no collections — and at one point, we even boot up Windows 98. If you thought Part 1 was painful, this one unwinds Java history line by line. By the end, the familiar Java from today will be almost gone.

It's Fine Actually: Doing Better in Legacy Java

5x Smaller Java Docker Images — 2025 Optimization Guide

In this video, I’ll show you how to make your Java Docker images 5 TIMES SMALLER. You’ll see the full process, from a heavy 587MB container to a lean 116MB image, ready for production.

How to install Liberica Native Image Kit on Windows PC

Liberica Native Image Kit is a multilingual GraalVM-based set of utilities for creating native images. This guide will help you to install it on Windows PC.

Java DTO Guide: Fix Your API Design with One Simple Pattern

This tutorial shows how to use the Data Transfer Object (DTO) pattern to transfer data between application layers. We use Java records to reduce boilerplate code and the MapStruct library that simplifies Java bean mapping.

Downgraded Java to JDK 1.1 After 30 Years… (part 1)

How should we change Java 23 code for it to run on Java 1.1? We go line by line, removing modern features like records, sealed classes, switch expressions, var, and more. Each step reveals what breaks, how to rewrite it, and what you lose in the process. If you've ever wondered how far modern Java has drifted from its roots - this is your deep dive into that gap. This is Part 1 of the Java Downgrade Challenge, where we descend version by version until we reach Java 8. Subscribe to our channel to find out how we go even deeper - all the way down to Java 1.1. Stay tuned!

Swagger UI Integration in Spring Boot 3

How to integrate Swagger UI in Spring Boot 3 using springdoc-openapi This beginner-friendly tutorial shows how to document REST APIs in Java using Swagger UI, customize OpenAPI metadata, group and version endpoints, and secure the Swagger interface — all with Spring Boot 3 and Java 21.

Java in 2025: Busting the Biggest Myths

Think Java is slow, outdated, or only for old-school enterprise apps? Think again. In this episode of Java Myth Busters, we debunk six common myths about Java, including performance issues, security concerns, and the myth that Java is dead. Discover how the JVM, Spring Boot, GraalVM, and modern JDK updates make Java one of the most powerful, scalable, and relevant languages in 2025.

Spring Boot Buildpacks: Optimize, Secure, and Shrink Your Containers!

Buildpacks let you containerize Spring Boot apps without writing Dockerfiles, but the default settings aren’t always optimal. In this video, I’ll show you how to fine-tune buildpacks for faster startup, smaller images, and better security—so you get the best performance with minimal effort.

SBOMs & Java Security: Stay Compliant, Stay Protected!

A software bill of materials or SBOM is crucial for the modern development environment full of regulations, vulnerabilities, and hidden threats. In this video, we discuss what SBOMs are and how they help dealing with compliance audits and application security. We will explore the best open-source tools for generating SBOMs and provide a tutorial on creating an SBOM for your project and analyzing it for vulnerabilities.

Async Profiler: Uncover Hidden Performance Issues in Java!

Let's discuss Async Profiler, the small and effective open-source low-overhead profiler for Hotspot JVM-based application. Itcan collect data on various JVM events like CPU usage, heap allocation, methods, and so on. It can monitor non-Java threads, native calls, and kernel functions. It is small, silent, and incredibly effective!