Jago de Vreede
Developer at TenneT
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Jago is a full-stack software engineer at TenneT, as a software engineer he has seen a broad-spectrum of projects. He also likes to take Java to the extreme and do things with are normally not done with Java, like playing an automated guitar. He is passionate about his work and likes to share his knowledge and has therefore spoken at conferences worldwide.
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Quiz: What do you know about java compiler optimizations?
The Java HotSpot compilers support a suite of advanced optimizations to enable high-performance programs. Some of these optimizations include method inlining, removing unnecessary checks and code. The compiler does this at different times, but what do you already know about these optimizations? In this quiz, I’ll test your knowledge of different optimizations. After each question, the answer will be explained. So even if you don’t know anything about the subject you should get a deeper understanding of why the compiler behaves as it does, even the most seasoned developers will go wtf at some point. It also shows why sometimes fast unreadable code is just as good as clean code. To be able to participate you will need an internet-connected device.
3 years of Quarkus in production, what have we learned?
Quarkus has grown in popularity in the last years, but what’s it really like to use it in large-scale, real-world business projects? In this session, we’ll move beyond the basics of "Hello World" to explore how to build enterprise-level applications with Quarkus efficiently.
In this talk we will set up a multi-module project, incorporating integration tests and addressing the challenges with build times, while maintaining a high development velocity. Next, we’ll tackle an upgrade scenario and splitting the application into multiple microservices. Along the way, we’ll share hard-earned lessons, including what to avoid.
At the end of the talk, you should have a good understanding of how to efficiently set up a “big” enterprise project with Quarkus and the confidence to get started.
Spring Boot vs Quarkus the ultimate battle!
When you’re building (micro)services, you have lots of framework options. Spring Boot is no doubt a popular choice. But there’s more! Take Quarkus, a framework that’s considered the rising star for Java.
Both Spring Boot and Quarkus have their positives and negatives, so let's compare the 2, by coding a couple of common use cases in a not so common format in Spring Boot and Quarkus.
After this talk, you’ll be ready to start with Spring Boot or Quarkus yourself and know when to select Quarkus or Spring Boot.
Java developer-friendly frontends: Build UIs without the JavaScript hassle
Have you ever needed to build a UI as a backend developer but didn’t want to dive deep into JavaScript frameworks? Sometimes, all you need is a straightforward way to display and interact with data. So, what are the best options for Java developers?
In this talk, we’ll explore three popular tools that make it easy to build UIs in a way that suits backend-focused developers:
HTMX for enhancing static HTML pages with dynamic interactions without heavy JavaScript,
Vaadin for full-stack applications entirely in Java with minimal frontend skills, and
JavaFX for creating Java-based UIs with drag-and-drop simplicity.
We’ll build the same UI in each technology, comparing the developer experience. At the end of the talk, you’ll be better equipped to choose the best UI technology for your next project.
Lessons learned using Machine Learning in Java
In this talk, I will share my journey of using machine learning in Java to build a visual recognition system that can identify Lego blocks. As a Java developer, I wanted to use Java for this project rather than Python, which is more commonly used for machine learning projects. I will explain the basics of machine learning and give an overview of the current Java libraries for machine learning and transferring pre-trained models. I will demonstrate how to train and modify existing models using transfer learning. The goal of the project is to create a Java solution that can identify the top 1000 most popular Lego bricks. I will explain all of this without using any complex mathematical formulas, making it accessible to those with no prior knowledge of machine learning.
Building a native multiplatform SDKMAN in JavaFX
SDKMAN is one of the most popular ways to install/upgrade Java or other build tooling on your system. It works great from the command line, but what if you could bring its power to a graphical interface? And what if it worked seamlessly on Windows too?
In this talk, we will use SDKMAN as an example of how to build a multiplatform native application using JavaFX for the UI and GraalVM to compile native images.
We will dive into the process of creating native apps with GraalVM, distributing them with GitHub actions, and identifying some limitations of native Java applications. Plus, we’ll explore alternative methods for shipping native apps across platforms.
By the end of this session, you will have practical insights on how to build and distribute native apps with or without JavaFX.
J-Fall 2023Sessionize Event
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