You’ll need to change your adle file to look something like: plugins " However, the JavaFX Gradle Plugin (version 0.0.9) can’t do what’s needed if you’re using Gradle 6.7 or above (which you will be if you’ve created a Gradle application from IntelliJ IDEA 2020.3), since Gradle changed the way it builds applications that use the Java Module System. The OpenJFX Getting Started Documentation walks through creating an application like this (follow the menu items "JavaFX and IntelliJ" -> "Modular with Gradle"). The main one you need to be aware of is that modular applications use the module path, not the classpath we know and love. There are a number of subtleties for working with modules, which I won’t cover in this example. The only real impact on a small application like the demo app we’re writing here is one additional file, module-info.java. If you want a seamless experience working with IntelliJ IDEA, JavaFX and Gradle, and you are free to make all the architectural decisions, try creating a modular application using Java’s Module System (introduced in Java 9). These example applications were all started by following the OpenJFX Getting Started Documentation on the openjfx site, any differences between that guide, and the final code are documented. Since both build tools are popular, I wanted to cover both of them.
Having worked with both Maven and Gradle in my JavaFX applications, I’ve seen the approaches both tools take. This is mostly because UI frameworks depend more upon your operating system than other sorts of frameworks, so the build tool needs to pull in the correct dependency for your OS. We can’t just add a new dependency in our Maven or Gradle file and start using it straight away. JavaFX is not quite as simple a dependency as any other library you might be using in your applications. What I wanted to find out is what’s the current best way to create a new JavaFX application, and how do you run it from inside IntelliJ IDEA?
I’ve been using JavaFX in a number of my demo applications over the last six years, and the one thing I’ve learnt is that it’s a bit of a moving target, in particular since JavaFX was taken out of the JDK in Java 11.
This week we’re doing a Live Stream on JavaFX, and I wanted to use that opportunity to refresh my JavaFX knowledge.
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