Java SE (Java Platform, Standard Edition)

I want to apply my css rule to specific nodes of WebView.

I use  Node.lookupAll(String cssSelector) method to find the node

(http://docs.oracle.com/javafx/2/api/javafx/scene/Node.html#lookupAll%28java.lang.String%29)

and Node.setStyle(String ccsStyle)  to apply my rules  (http://docs.oracle.com/javafx/2/api/javafx/scene/Node.html#setStyle%28java.lang.String%29)

As an example I use the following code from JavaFX Documentation

http://docs.oracle.com/javafx/2/webview/jfxpub-webview.htm

public class WebViewSample extends Application {

    private Scene scene;

    @Override
    public void start(Stage stage) {       
        stage.setScene(scene);
        stage.show();
    }
    public static void main(String[] args) {
        launch(args);
    }
}
class Browser extends Region {

    final WebView browser = new WebView();
    final WebEngine webEngine = browser.getEngine();

    public Browser() {
      
        webEngine.load("http://www.google.gr");
        getChildren().add(browser);

        Set<Node> lookupAll = browser.lookupAll("body");

        if (lookupAll.isEmpty()) {
            System.out.println("Lookup is empty");
        } else {

            for (Node n : lookupAll) {
                n.setStyle("{background-color:gray;}");
            }
        }
    }

    private Node createSpacer() {
        Region spacer = new Region();
        HBox.setHgrow(spacer, Priority.ALWAYS);
        return spacer;
    }

    @Override
    protected void layoutChildren() {
        double w = getWidth();
        double h = getHeight();
        layoutInArea(browser, 0, 0, w, h, 0, HPos.CENTER, VPos.CENTER);
    }

    @Override
    protected double computePrefWidth(double height) {
        return 750;
    }

    @Override
    protected double computePrefHeight(double width) {
        return 500;
    }
}