J-Spring 201921 Videos

J-Spring 2019: Martijn Jansen – Is GraphQL the new REST?

According to many developers, GraphQL is the solution for everything that is wrong with REST. But is this really the case? In this talk I will walk you through GraphQL and for which cause I used this technique. Is it really the new REST? Bio Martijn Martijn Jansen is currently working at the Rabobank for […]

J-Spring 2019: Bert jan Schrijver – NLJUG Update

What is the status of the NLJUG and where are we going? Bio Bert Jan Bert Jan is CTO at OpenValue and focuses on Java, Continuous Delivery and DevOps. Bert Jan is a Java Champion, JavaOne Rock Star speaker, Duke’s Choice Award winner and leads NLJUG, the Dutch Java User Group. He loves to share […]

Jspring 2019 Teaser

J-Spring 2019 is coming up and we’ve got what you are expecting of us and more! This years line-up is diverse and full of the greatest national and international Java heroes. Want to know what to expect? Then check out this teaser! Check out the website with the full timetable here. Don’t have your ticket […]

J-Spring 2019: Brian Vermeer – Live exploiting your open source dependencies

Today, almost all software heavily relies on the use of third-party dependencies. While open source modules are undoubtedly awesome, they also represent an undeniable and massive risk. You’re introducing someone else’s code into your system, often with little or no scrutiny. Including the wrong package can introduce severe vulnerabilities, exposing your application and your user’s […]

J-Spring 2019 Aftermovie

J-Spring 2019 was the Java conference of the spring by the NLJUG. More than 600 Java specialists came together to learn, share ideas and listen to world-level speakers such as Burr Sutter, Adam Bien and 16 other national and international heroes. Take a look at this recap to feel what J-Spring was like. A big […]

J-Spring 2019: Michel Schudel – Cryptography 101 for Java developers

So you’re logging in to your favorite crypto currency exchange over https using a username and password, executing some transactions, and you’re not at all surprised that, security wise, everything’s hunky dory… Ever wondered about the amount of cryptography begin used here? No? Let’s dive into the key concepts of cryptography then, and see how […]

J-Spring 2019: Adam Bien – Kickass Apps with Boring Tech: Interactive Hacking #Slideless

What happens, when you focus on the domain and ignore the technology? In this session I will hack a full stack application from microservice backend to WebStandards frontend without any esoteric frameworks, technologies or libraries. Questions are highly welcome and are going to be answered in real time. Bio Adam Adam Bien: Java (EE), Jakarta […]

J-Spring 2019: Onno Schellekens & Barry Lagerweij – Keynote: Can we use mobile technology to leapfrog universal health for developing countries?

Mobile technology is changing the world at a speed nobody can imagine. Industrial activities are being revolutionized. There is a real opportunity to use mobile technology to leapfrog healthcare in developing countries. Bio Onno Onno Schellekens is voorzitter van het Joep Lange Instituut en algemeen directeur van PharmAccess. Hij is medeoprichter van het Investment Fund […]

J-Spring 2019: Katherine Stanley – An introduction to Apache Kafka – this is Event Streaming, not just Messaging

The amount of data the world produces is growing exponentially every year and many companies are realising the potential of harnessing this data. A lot of this is generated in the form of a never ending stream of events, with publishers creating the events and subscribers consuming them in many different ways. This is where […]

J-Spring 2019: Brian Vermeer & Paulien van Alst – My Kotlin is better than your Java

TLDR: The big discussion: Kotlin or Java, to migrate or not to migrate and why… The world of languages on the JVM has seen alternatives to Java come and go. Kotlin is probably the most popular one at this moment. Although Java is still one of the most commonly used programming languages, Kotlin seems to […]