JavaFX is a GUI library for Java that can be used on desktop. The official documentation is available at https://openjfx.io. Also refer to their Getting Started with JavaFX guide.

You'll need a few things:

• Java JDK 11+
• JavaFX Modules
• Scene Builder (Optional)

Download the JavaFX Modules from https://openjfx.io/. The jmods download is the one with the modules and the SDK contains the .jar files and dynamically linked libraries (e.g. .dylib). The modules are for building runtimes with jlink and the library files are used for compiling. Optionally, also download the Scene Builder from https://gluonhq.com/products/scene-builder/ which is a visual GUI designer to generate .fxml template files.

There are a few helpful resources to get started:

• Examples on GitHub https://github.com/openjfx/samples
• Running from the CLI https://openjfx.io/openjfx-docs/#install-javafx
• Run HelloWorld using Maven https://openjfx.io/openjfx-docs/#maven

Here is a simple Hello World example:

HelloFX.java

// Feom https://github.com/openjfx/samples/blob/master/HelloFX/CLI/hellofx/HelloFX.java
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
 
public class HelloFX extends Application {
 
    @Override
    public void start(Stage stage) {
        String javaVersion = System.getProperty("java.version");
        String javafxVersion = System.getProperty("javafx.version");
        Label l = new Label("Hello, JavaFX " + javafxVersion + ", running on Java " + javaVersion + ".");
        Scene scene = new Scene(new StackPane(l), 640, 480);
        stage.setScene(scene);
        stage.show();
    }
 
    public static void main(String[] args) {
        launch();
    }
 
}