GroovyFX code I got running on the Raspberry PI

bashrc

export JAVA_HOME=/usr/local/java
export JAVAFX_HOME=$JAVA_HOME/jre/lib
export PATH=$JAVA_HOME/bin:$PATH

clone.bash

git clone git://github.com/groovyfx-project/groovyfx.git
cd groovyfx

cmdline.bash

groovy -cp groovyfx-0.4.0-SNAPSHOT.jar:$JAVAFX_HOME/jfxrt.jar:. -Djavafx.platform=eglfb text.groovy

config_changes

framebuffer_width=1280
framebuffer_height=720

gradle.bash

./gradlew assemble

javastep.bash

# unpack java
tar vxfz jdk-8-ea-b36e-linux-arm-hflt-29_nov_2012.tar.gz
# move it to /usr/local
sudo mv jdk1.8.0 /usr/local
cd /usr/local
# create a link to it
sudo ln -s jdk1.8.0 java

text.groovy

import groovyx.javafx.GroovyFX
import javafx.scene.input.KeyCode
import javafx.application.Platform

GroovyFX.start {
  stage(title: "GroovyFX Hello World", visible: true) {
    scene(fill: black, width: 1280, height: 720) {
      onKeyPressed { event ->
        if (event.getCode() == KeyCode.ESCAPE) {
          Platform.exit();
        }
      }
      hbox(padding: 80) {
        text(text: "Groovy", style: "-fx-font-size: 80pt") {
          fill linearGradient(endX: 0, stops: [palegreen, seagreen])
        }
        text(text: "FX", style: "-fx-font-size: 80pt") {
          fill linearGradient(endX: 0, stops: [cyan, dodgerblue])
          effect dropShadow(color: dodgerblue, radius: 25, spread: 0.25)
        }
      }
    }
  }
}