JavaFXのコンポーネントをSwingに配置するサンプル。現時点ではExceptionでまくり…。たぶん、ウインドウサイズをある値より大きくするとブラウザビューの範囲外が表示されてしまって、そこでExceptionがでているんだと思う。ソースはここ→http://d.hatena.ne.jp/nowokay/20110526#1306438744

error.txt

// JavaFXのコンポーネントを専用のスレッド以外から変更(ウインドウサイズを大きくしたときとか)に
// このExceptionがでる。JavaFXのコンポーネントに変更を加えるようなコードを
// Platform.runLater()でラップしていけばたぶんでなくなる

java.lang.NullPointerException
	at com.sun.javafx.tk.quantum.EmbeddedScene$PaintRunnable.paintImpl(EmbeddedScene.java:154)
	at com.sun.javafx.tk.quantum.EmbeddedScene$PaintRunnable.run(EmbeddedScene.java:230)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
	at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
	at com.sun.prism.render.RenderJob.run(RenderJob.java:29)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at com.sun.javafx.tk.quantum.QuantumRenderer$ObservedRunnable.run(QuantumRenderer.java:70)
	at java.lang.Thread.run(Thread.java:662)

WebFrame.java

package fx;

import java.awt.BorderLayout;
import java.awt.Dimension;

import javafx.application.Platform;
import javafx.embed.swing.JFXPanel;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;

import javax.swing.JFrame;

@SuppressWarnings("serial")
public class WebFrame extends JFrame {

	private javax.swing.JButton urlButton;
	private javax.swing.JPanel urlButtonPanel;
	private javax.swing.JPanel fxPanel;
	private javax.swing.JTextField urlField;

	WebEngine engine;

	public WebFrame() {
		initComponents();

		final JFXPanel panel = new JFXPanel();
		fxPanel.add(panel, BorderLayout.CENTER);

//		TmpFxLauncher.launch();

		Platform.runLater(new Runnable() {
			public void run() {
				// This code must run on FX application thread.
				engine = new WebEngine("http://d.hatena.ne.jp/nowokay/");
				WebView webView = new WebView(engine);

//				Media media = new Media("http://www.hmix.net/music/n/n43.mp3");
//				MediaPlayer mp = new MediaPlayer(media);
//				MediaView mediaView = new MediaView(mp);
//				mp.play();

				Group root = new Group();
				root.getChildren().add(webView);
				Scene scene = new Scene(root);

				panel.setScene(scene);
			}
		});
	}

//	public static class TmpFxLauncher extends Application {
//		@Override
//		public void start(Stage primaryStage) {
//		}
//
//		private static void launch() {
//			Application.launch(null);
//		}
//	}

	private void initComponents() {

		urlButtonPanel = new javax.swing.JPanel();
		urlField = new javax.swing.JTextField();
		urlButton = new javax.swing.JButton();
		fxPanel = new javax.swing.JPanel();

		setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
		setTitle("WebView Browser");

		urlField.setColumns(30);
		urlField.addActionListener(new java.awt.event.ActionListener() {
			public void actionPerformed(java.awt.event.ActionEvent evt) {
				jTextField1ActionPerformed(evt);
			}
		});
		urlButtonPanel.add(urlField);

		urlButton.setText("jButton1");
		urlButton.addActionListener(new java.awt.event.ActionListener() {
			public void actionPerformed(java.awt.event.ActionEvent evt) {
				jButton1ActionPerformed(evt);
			}
		});
		urlButtonPanel.add(urlButton);

		getContentPane().add(urlButtonPanel, java.awt.BorderLayout.NORTH);

		fxPanel.setLayout(new java.awt.BorderLayout());
		getContentPane().add(fxPanel, java.awt.BorderLayout.CENTER);

		setPreferredSize(new Dimension(300, 300));
	}

	private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
		Platform.runLater(new Runnable() {
			public void run() {
				engine.load(urlField.getText());
			}
		});
	}

	private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {
		jButton1ActionPerformed(evt);
	}

	public static void main(String args[]) {
		WebFrame frame = new WebFrame();
		frame.pack();
		frame.setVisible(true);

//		SwingUtilities.invokeLater(new Runnable() {
//
//			public void run() {
//				WebFrame frame = new WebFrame();
//				frame.pack();
//				frame.setVisible(true);
//			}
//		});
	}

}