package calc;
import java.io.InputStreamReader;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;
public class CalculatorLauncher {
public static void main(String[] args) {
 try {
 ScriptEngineManager manager=new ScriptEngineManager();
 ScriptEngine engine = manager.getEngineByExtension("fx");
 InputStreamReader reader = new InputStreamReader
 (CalculatorLauncher.class.getResourceAsStream("Calculator.fx"));
 engine.eval(reader);
   } catch (ScriptException ex) {
  }
 }
}

public interface JavaInterface
{ ... }
在 MyJavaFXClass.fx中, 可以這樣寫:

public class MyJavaFXClass extends JavaInterface
{ ... }

JavaMain.java
public class JavaMain {
  public static Object start( JavaInterface ji){
    return ji.createStage();
  }
}
JavaInterface.java
public interface JavaInterface {
  public Object createStage();
}
MyStage.fx
public class MyStage extends JavaInterface {
  public override function createStage(): Object{
    Stage {
      title: "Application title"
      width: 250
      height: 80
      scene: Scene {
        content: Text {
          font: Font {
            size: 24
          }
          x: 10,
          y: 30
          content: "Application content"
        }
      }
}
  }

var mys = MyStage{};
JavaMain.start(mys);