Creating aggregate JavaFX bindings

The standard JavaFX API provides a class named Bindings that can be used to create all kinds of bindings your application may need. Methods in this class can be used to translate any Observable, ObservableValue, Binding, Expression, and/or Property into another Binding, regardless of their original type. Here’s for example how you could translate a StringProperty into an IntegerBinding, by exposing the length of the contained String: StringBinding sourceBinding = … // initialized elsewhere IntegerBinding lengthBinding = Bindings.createIntegerBinding( () -> sourceBinding.get().length(), sourceBinding); While quick and to the point we’re forced to read the value directly from the inputs (in this Read More

Announcing DesktopPaneFX

Recently at work we faced the need of implementing a user interface that delivered similar features as the ones exposed by Java Swing’s JDesktopPane but for JavaFX. Unfortunately JavaFX does not provide such component out of the box, nor do the most common JavaFX controls projects out there. There are however a few attempts to put something together but most never left the prototype stage or have been abandoned. That’s how I found JavaFXMDI, which seemed to have the right approach but was left unattended for close to 3 years. Fortunately the code was published as Open Source, thus after Read More

May Java be with You!

May was quite a hectic but fun month for me. The month began with a new state of mind as I found myself without a job albeit not for long as I’d join my next employer at the beginning of June, and though that was the plan all along I couldn’t shake the feeling of having to cut short a particular experience just to get back to work e-mails. Despite finding myself unemployed for a month I didn’t get much time to slack off as the next 5 weeks proved to be quite the ride round the globe (quite literally!) Read More

Customize JAR manifest entries with Maven/Gradle

How many times have you found yourself in a situation where you can’t tell if the artifacts used by the application are the correct ones or not? How many times have you looked at a bug report stating that the problem is caused by version X of a particular artifact but you are certain the bug was fixed in said release? On closer inspection (after unpacking, debugging, even decompiling!) you find that the artifact in production is not the right one even though the version appears to be the correct one. One option we have to mitigate this problem is Read More

Maven scopes vs. Gradle configurations

Both Maven and Gradle are popular choices when it comes to building Java projects. These tools share common traits but there are some key differences that make you more productive depending on a particular scenario (no, I’m not referring to the XML DSL vs. Groovy/Kotlin DSL schism), case in point scopes vs. configurations. Scopes and configurations are used by each tool to define dependencies and how they affect different classpaths, such as the compilation and runtime classpaths. Maven defines 6 scopes: compile, runtime, provided, system, test, and import. Gradle on the other hand defines the following configurations when the Java Read More

Contributing to JavaFX

Johan Vos (@johanvos) has setup a mirror of the official OpenJFX codebase as a repository at Github ( This repository allows anyone interested in contributing to JavaFX to be able to send patches to the project. Would you like to join the efforts to move JavaFX forward? These are the steps you must follow with the current pipeline: Have a Github account. It only takes a few minutes to setup and it’s free! Have a bug/feature in mind you’d like to see fixed/added to JavaFX. Browse the list of open issues at to see if you can help; discussing Read More

2017 in Review

2017 has been a hectic year to say the least, however on the JVM side of things I’m quite happy with the results so far. We’ve got a brand new release of Java in September! The feature list added to Java9 is impressive, you can catch a glimpse of what’s new in Trisha’s (@trisha_gee) Real World Java 9 talk. Of course the elephant in the room when it comes to Java 9 is Jigsaw. Developers around the world are still trying to figure out how to get their tools and libraries to work with the new modular system, I recommend Read More

First JCP EC face-to-face meeting in 2018

The JCP Executive Committee meets once a month to discuss topics of relevance to the Java platform and its community. Being a group of 25 members distributed around the world the preferred option for these meetings is the remote one, however the EC comes together 3 times a year to meet face-to-face, the first of these meetings just happened a few days ago at IBM’s campus in Hursley, UK. First day of the January #JCP EC meeting hosted by @IBM in Hursley — JCP (@jcp_org) January 30, 2018 This was my second meeting as part of the JCP EC Read More

Keeping your codebase healthy

Maintaining a project in a healthy state should have a higher priority in light of recent events. There are a handful of techniques and measures that can be applied to keep the codebase neat and tidy. If your project is built with Gradle then the following list may come in handy when taking matters in to your own hands: ossindex versions license jdeps jacoco checkstyle pmd findbugs/spotbugs codenarc sonarqube Each plugin takes care of an specific dimension and together they can strengthen your codebase. Let’s begin with the ossindex plugin. This plugin scans project dependencies and checks if there are Read More

Happy 9th Birthday Griffon!

Today marks the 9th anniversary of Danno’s announcement of Griffon 0.0. It’s been quite the ride since then, and lots of fun if I may say so. As Danno noted, Griffon began life as a fork of the Grails codebase at the time. He literally copied the Grails source, removed everything that was related to HTTP and Servlets and added Swing on top. This allowed Griffon to bootstrap itself very quickly and begin its own journey. The feedback we’ve got was very positive and we happily continued adding more features, letting Griffon to have it’s own identity. Plugin support was Read More

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