I am unable to get the JFXPanel to work in the latest build (b21).

The API documentation example was cutoff, so that was of no help. Instead, I followed Irina's guide (javafx-sdk2.0-ea/docs/javafx/2.0/swing/jfxpub-swing.htm).

I reproduced her example as closely as possible, and was unable to get it to work (the result was a gray JPanel window with no contents). If you launch the same JavaFX scene in a normal Application it works fine.

I tested this on Windows and Mac. Surprisingly the results on both were different, but in neither case did it actually work. Full project is attached as a zip, and a screenshot of the results on Windows is attached as well.

====== CODE STARTS HERE =====
package jfxpaneltest;

import java.awt.BorderLayout;
import java.awt.Dimension;
import javafx.application.Application;
import javafx.application.Launcher;
import javafx.embed.swing.JFXPanel;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public class Main extends Application {
    private static JFXPanel javafxPanel;

    @Override
    public void start(Stage mainStage) {
        System.out.println("start called");
        // This method is invoked on JavaFX thread
        Group root = new Group(new Button("Hi"));
        Scene scene = new Scene(root, Color.ALICEBLUE);
        javafxPanel.setScene(scene);
    }

    public static void initAndShowGUI() {
        JFrame frame = new JFrame("Swing application");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // Create JavaFX panel.
        javafxPanel = new JFXPanel();
        javafxPanel.setPreferredSize(new Dimension(550, 400));
        frame.getContentPane().add(javafxPanel, BorderLayout.CENTER);

        // Create JavaFX scene.
        Launcher.launch(Main.class, null);

        // Show frame.
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                initAndShowGUI();
            }
        });
    }
}