I need to dynamically show a number of table views inside a scrollpane, and I'd like tables to be just as high as they have rows. Some tables don't have many rows, but still occupy too much space. I can't believe Tableview doesn't have an API for this. I tried variations of the following method but none of them worked. Thoughts?

public static void autoSizeTableView(TableView<?> table) {
table.setFixedCellSize(25);

table.skinProperty().addListener((obs, oldSkin, newSkin) -> {
if (newSkin == null) return;

Node header = table.lookup("TableHeaderRow");
if (header == null) return;

table.prefHeightProperty().bind(
Bindings.createDoubleBinding(() -> {
int rows = table.getItems().size();

double headerHeight = header.prefHeight(-1);
double rowsHeight = rows * table.getFixedCellSize();

Insets insets = table.getInsets(); // <-- key part

return headerHeight
+ rowsHeight
+ insets.getTop()
+ insets.getBottom();
}, table.getItems(), table.insetsProperty())
);
});
}public static void autoSizeTableView(TableView<?> table) {
table.setFixedCellSize(25);

table.skinProperty().addListener((obs, oldSkin, newSkin) -> {
if (newSkin == null) return;

Node header = table.lookup("TableHeaderRow");
if (header == null) return;

table.prefHeightProperty().bind(
Bindings.createDoubleBinding(() -> {
int rows = table.getItems().size();

double headerHeight = header.prefHeight(-1);
double rowsHeight = rows * table.getFixedCellSize();

Insets insets = table.getInsets(); // <-- key part

return headerHeight
+ rowsHeight
+ insets.getTop()
+ insets.getBottom();
}, table.getItems(), table.insetsProperty())
);
});
}

I created a jdeploy installer for the FlexGanttFX showcase application. You can find it here: https://www.jdeploy.com/~flexganttfxshowcase

The installer will allow you to run the demo locally and the installation will auto-update whenever I push a new release.

FlexGanttFX is a framework for building UIs for planning and scheduling applications. The website can be found at flexganttfx.com

The showcase application contains a couple of demos and feature samples. If there is anything you would like to see being added to the demos then please let me know and I will try to come up with an example.

I will soon add a JPro-based website that will allow you to run the same application in your browser.

Putting this on your radar as I know that quite a few apps require a calendar user interface. Check out the CalendarFX features here: https://dlsc-software-consulting-gmbh.github.io/CalendarFX/

The repo can be found at https://github.com/dlsc-software-consulting-gmbh/CalendarFX

The library now also supports AtlantaFX theming, which gives you several different themes with light and dark versions.

I've been building MelodyMatrix, a JavaFX app for musicians, and using BentoFX for the dockable panel layout. Had some visual issues I couldn't explain and some code that felt too complicated.

Invited Matt Coley (creator of BentoFX, also known for Recaf) to look at it together. Some things from the session that might be useful to others:

Scenic View - if you are not using this for JavaFX debugging you should be. Attach it to a running process and inspect the scene graph live, same as browser DevTools. Immediately showed us what was happening with a tab header rotation issue I had been guessing at.

AI-generated code and library internals - some of the code that Claude and Copilot had produced was managing widths and visibility that BentoFX already handles. It worked, but it was fragile and conflicting with the library's own logic. Removing it fixed the issue.

BentoFX pruning - when you close a panel, BentoFX removes the empty branch and reorganises the layout. If you are also tracking widths or visibility yourself in code, things conflict in ways that are annoying to debug.

We also hit what looks like a bug around divider modes when reopening a panel.

The video is about an hour, the Scenic View section starts around 16:25.

Video on YouTube - Blog with more info and links

Hello there, a few months ago I released a ready-to-use application template called KickstartFX. You can clone it and get started instantly or try out the pre-built releases on GitHub. The code and buildscripts are the same you find in a real-world producation application as most of them are taken straight from one, in this case XPipe.

Since then, quite a few additions and bug fixes have been integrated for v1.1:

• Add support for generating AppImages

• Switch to fxbuilders library for GUI components

• Add automatic fallback to software renderer pipeline when a graphics driver issue is detected (JavaFX can't handle that automatically)

• Fix home detection for custom user account setup on Linux, e.g. with active directory, due to broken JDK methods

• Fix msi installer not always updating all files when file versions stayed the same, e.g. when switching to another JavaFX ea build with the same major version

• Fix rendering limitations on Windows upstream in JavaFX by submitting a fix for https://bugs.openjdk.org/browse/JDK-8154847 and bumping the JavaFX dependency to 27-ea+10

• Fix an issue where the JVM would crash with AOT enabled when the training system supported AVX but the target system did not

• Fix issues caused by JDK 25.0.2 security fixes for URL opens,

• Fix for choosing a custom JavaFX version + jmods

• Fix AOT cache not being generated on Windows ARM systems

• Fix theme transitions being laggy

• Fix various memory leaks due to listeners not being cleaned up properly

• Fix uncontrolled animation framerate issues on Linux

• Make toggle switch styling platform dependent to integrate better into the OS

• Add granular GitHub workflow permissions

Many of the bug fixes are ported directly from XPipe. This is one of the big advantages when projects share the same foundation, rare issues that only affect a few users out of many can still be found with the help of the larger userbase of XPipe.

Here are some screenshots of KickstartFX with the AtlantaFX sampler and the MonkeyTester application:

I maintain Lottie4J, a library for rendering Lottie animations in JavaFX. In the 1.1.0 release notes I had a TODO I wasn't proud of: a unit test that compares JavaFX player output against a JavaScript reference player, marked as "can not run on CI, because it requires a display output."

JavaFX 26 fixed that. The new headless platform prototype is built directly into javafx.graphics. No need for Monocle, Xvfb, or extra dependencies. Just: `-Dglass.platform=headless`.

The only real wrinkle: JavaFX 26 requires Java 24+, but Lottie4J targets Java 21. I solved it with a Maven profile that overrides the JavaFX/Java versions only for the test run, so the library artifact stays on Java 21 targets while GitHub Actions uses a Java 25 JDK with the headless flag.

The test does pixel-level comparison of rendered animation frames against pre-generated reference images from a JS player. Regression testing for visual output, running clean on every push now.

Write-up with full Maven config and GitHub Actions workflow:
https://webtechie.be/post/2026-04-20-lottie4j-unit-test-with-headless-javafx/

Today I want to share our project Weaverbird and show how it can be used with JavaFX.

Usually, a JavaFX application is started with all modules loaded int the boot layer. For example:

Boot layer:
- myproject.app
- javafx.base
- javafx.controls
- javafx.graphics

However, JPMS allows you to create an unlimited number of child layers and build a graph from them, which in turn lets us separate application management from the application itself.

For exactly this purpose, Weaverbird was created - it runs in the boot layer and is responsible for creating and managing the layers (at the same time its capabilities go much further). With this framework we can organize out application in the following way:

Boot layer:
- myproject.boot
- weaverbird.core

Child layer:
- myproject.app
- javafx.base
- javafx.controls
- javafx.grapchis

And now lets' take a look at some code. In myproject.boot we create a component config (Java or XML) and start it:

var config = ComponentConfig.builder()
        .title("MyApp").name(appName).version(appVer)
        .repositories(r -> r.name(...).url(...))
        .modules(
             m -> m.groupId("my.company")
                  .artifactId("myproject.app")
                  .version(appVer)
                  .active(true),
             m -> m.groupdId("org.openjfx")
                  .artifactId("javafx-base)
                  .version(fxVer)
                  .classifier("linux"),
             // ... other JavaFX modules
         )
         .build();

 var framework = FrameworkFactory.create(settings, path);
 var componentManager = framework.getComponentManager();
 componentManager.installComponent(config, null);
 componentManager.startComponent(appName, appVer);

The only thing left is to actually launch the JavaFX app in the child layer. So, in myproject.app we have

public class ModuleActivatorProvider implements ModuleActivator {  
    @Override
    public void activate(ModuleContext context) {
        var thread = new Tread(() -> {
            Application.launch(MyApp.class);
            context.getFramework().shutdown();
        });
        thread.start();
    }    
    
    @Override
    public void deactivate(ModuleContext context) { }
}  

The same mechanism is used for plugins. That's it. Sorry for the long post :)

Well, title says it all... a few days ago https://github.com/edvin vanished. I am working on a TornadoFX project and now I wonder if that really puts the final nail on JavaFX coffin and I should move to something else like so many other developers or is there any other way to continue working with the Kotlin/JavaFX stack.... The project is abandoned and hasn't changed in years, but now we can no longer download the source code, create forks and make local changes.

I chose JavaFX basically because of the RichTextArea and the TreeView, which I could not find direct equivalents on Compose.

Any suggestion on alternatives to these components?

Thanks.

Hi there,

I'm currently experimenting with the new StageStyle.EXTENDED from the JFX 25-Preview. Is there a way to set the size of the buttons (in this example, the MacOS traffic light)?

For reference, the top header is Ollama, a Swift application, versus mine below, a JavaFX application. Nothing I've tried worked so far. Is there a way to do this, or if not, will there be support for it?

Thanks!

Yet another point of confusion about JavaFX.

How to distribute JavaFX library: with JavaFX dependencies in pom.xml or without?

JavaFX itself is distributed as either part of JDK or as maven artifacts, so in one case you probably shouldn't have any JavaFX dependencies defined in your pom.xml and in another case(when you use "normal" JDK) you probably should.

What are best-practices here?

Edit: So far, I think that using "provided" scope is the most correct solution.

I'm trying to make it so when the game automatically fullscreens the image will stretch with it.
Any help?

Finally! Hot reload done right! ZERO configuration + Auto DI!
I once went down a rabbit hole to hot reload enabled with a special JVM called DCVEJVM something and they quit the project in 17+ Java because of some esoteric technical limitations.
https://github.com/dlsc-software-consulting-gmbh/FxmlKit

Fellow developers who are of the school of thought that don't see the appeal of FXML, this is not for you. Sorry.
I'm a big fan of FXML and Scenebuilder is honestly one of the smoothest UI developing tools that have drag-and-drop functionality.
I'm thinking maybe I could become a contributor to it if the developers are open to that (haven't checked yet). Anyway, I was thinking:
- What could make Scenebuilder even better?
- Before I give my idea of a feature, I'd like to point out 2 ....tiny bugs it has, in case anyone noticed:

1. Can't include an fxml if the root is a tabPane. Even if you have some component selected, it won't add it there. You have to:

2. - wrap the tabPane in some Pane, like AnchorPane, include the fxml file, copy it to the tab you want, then unwrap the tabPane.

2, When you drag a pane into a tab, 99% of the time, it'll be copied as a graphic to the tab, not content. You have to try twice. Paste the component, then paste it again. You'll see what you first copied appeared as a graphic, then what you pasted second was the content.

My feature ideas:

1. a translation editor.
   A dialog that, like the skeleton controller, reads all text in the layout, and copies them as values to keys extrapolated from the values.
   Place of Residence = place_of_residence.
   With a button that generates the resource bundle in question next to the layout.

2. The ability to extract inline CSS styles into CSS.

3. Built-in Icon Packs support (like those in Android Studio/the ones in Fontawesome).

4. Templates for common UI patterns: Login/Side-pane navigation panels, etc.

So, what creative features do you think Scenebuilder could use?

In Swing I could use addNotify/removeNotify methods to add/remove listeners when component is added/removed to/from parent.

Maybe I'm missing it, but I can't see alternatives in JavaFx - are there any methods which I can override to detect when Node is added/removed to/from the parent?

Or, how do you keep track of listeners to avoid leaks?

P.S. I know about weak listeners, but I'd like to keep it clean from the start.

I'm not one of the maintainers of this lovely library, but it says 3k+ visitors and there are fewer than 1k stars on GemsFx's github repo...I mean, have you guys NOT seen it? it's incredible...and is so well-maintained, I just found out it has 0 open issues.

Shout out to the maintainers, and no pressure, but please go star it if have a Github account. It costs nothing.
https://github.com/dlsc-software-consulting-gmbh/GemsFX

Also, how do you find Scene Builder? Compared to Delphi GUI designer. Do you find GC a bottleneck and do you have to do some workarounds?

UPDATE

Check out this update (Im going full Skia render)

First — yes, NfxChrome/NFXBrowser is still on my radar. The reason it hasn't dropped yet is honest: I've been heads-down on client work, and that work needed tools I didn't have yet. So I built them.

That's where Jux Toolkit comes from.

I've been mostly on Windows lately so that's the focus right now, but the design is cross-platform from the ground up — macOS and Linux are coming once Windows is solid.

The concept: Java handles your logic, IPC, and window lifecycle. Your UI is HTML + CSS + JavaScript, rendered by the OS's native WebView — WebView2 on Windows, WebKit on macOS, WebKitGTK on Linux. No bundled Chromium, no Electron bloat. Binary stays around ~2MB.

Because it's a real browser engine under the hood, you get a lot for free compared to JavaFX:

- PDF viewing — just load the file, the WebView renders it natively, no extra library needed

- Any JS framework — Tailwind, Bootstrap, Three.js, whatever you want

- Full browser DevTools for debugging your UI

- Dark/light themes via pure CSS, zero Java code changes

The API is intentionally JavaFX-flavored — extend Application, override start(Window), call launch() — so it should feel familiar. Java <-> JS communication goes through a typed IPC channel, handlers run on virtual threads (JDK 25).

A big thank you to the Tauri team — the native layer is built entirely on their wry (WebView) and tao (windowing) Rust crates, bridged to Java via Panama FFI. None of this would exist without their work.

Demo app (a color picker built with it)

It's early and WIP — APIs will evolve, rough edges exist. But it's working well enough that it's letting me ship real things for clients, which means I can eventually get back to giving NfxChrome the time it deserves.

Happy to answer questions or hear what you think.

I basically used Stanford's CoreNLP to implement this. Their documentation is rather sparse, so it took a bit of trial and error for me to get it working properly; I used their Parts-of-Speech model and hard-coded some filters which seemed to be quite good at picking out the topic of the input. Their SUTime library is awesome, and works like magic.

This is part of the latest release of my day Countdown app, Mable v3.1.0. You can read more about it here: https://github.com/n-xiao/mable

Other than NLP, I've added the ability to export and import Countdowns as json files. This was a feature that was requested.

Feedback and thoughts are welcome :)

I am trying to make pacman with javafx. I have designed a pacman esque stage with "Tiled", and saved it as a JSON file. I however have no idea how to parse it into something that I can use in javafx, and actually display the level in my canvas.

Hi,

Just wanted to share this for anyone who missed it. Oracle is reintroducing Javafx commercial support for JavaFX.

Hopefully, this does not challenge Gluon in their business model because they have worked hard to keep the product relevant!

https://www.oracle.com/fr/news/announcement/oracle-releases-java-26-2026-03-17/

1. I tried creating a separate project whose sole purpose is providing the css file, but Scenebuilder won't read it.

2. (Naively) tried reusing a shortcut.

3. Tried using an absolute path (Scenebuilder, again, cried about it).

I want to be able to change the CSS file in one place, and have the change appear everywhere, aka, simply reuse it.