import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

import javafx.application.Application;
import javafx.embed.swing.SwingNode;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class ClickTest extends Application {

    @Override
    public void start(Stage stage) {
        StackPane pane = new StackPane();
        SwingNode swingNode = new SwingNode();
        init(swingNode);
        pane.getChildren().add(swingNode);
        final Scene scene = new Scene(pane,300, 250);
        scene.setFill(null);
        stage.setScene(scene);
        stage.show();
    }
    
    private void init(final SwingNode swingNode) {
    	SwingUtilities.invokeLater(new Runnable() {
    		public void run() {
    			JPanel panel = new JPanel();
    	    	panel.setLayout(null);
    	    	JButton comp = new JButton("OK");
    	    	comp.setBounds(20, 20, 100, 50);
    	    	panel.add(comp);
    	        swingNode.setContent(panel);
    		}
    	});
    }

    public static void main(String[] args) {
        launch(args);
    }
}