JxBrowser 6.1 JavaScript Java Bridge API is not working

I think that there is a problem with the JavaScript Java Bridge API in JxBrowser 6.1 . I have tried a very simple code to call a method of a java class in Javascript. Here are the codes. In java, java is set as a property on javascript window object to an instance of Events class and then the html is loaded. In html, I simply call Close method of Events class. But when I click the Close button, java Close function doesn't get called and there is a message in console from JxBrowser saying :

Uncaught TypeError: Cannot read property 'Close' of undefined

which means that java property for window object is not defined.

Main.java:

public class Main extends Application {

    private Browser browser;

    public static void main(String[] args) {

        launch(args);

    }

    @Override
    public void start(Stage primaryStage) {

        Platform.setImplicitExit(false);

        browser = new Browser();

        JSValue window = browser.executeJavaScriptAndReturnValue("window");

        window.asObject().setProperty("java", new Events());

        BrowserView browserView = new BrowserView(browser);

        StackPane pane = new StackPane();

        pane.getChildren().add(browserView);

        Scene scene = new Scene(pane, 330, 470);

        primaryStage.initStyle(StageStyle.UNDECORATED);

        primaryStage.setScene(scene);

        primaryStage.show();

        browser.loadURL(Main.class.getResource("templates/simple.html").toExternalForm());

    }

}

class Events {

    public void Close() {

        System.out.println("close button clicked");

    }

}

simple.html:

<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
</head>
<body>
    <button id="Close">Close</button>
    <script>
        document.getElementById('Close').onclick = function () {
            window.java.Close();
        }
    </script>

</body>
</html>

Here is the article i've used to do this: https://jxbrowser.support.teamdev.com/support/solutions/articles/9000013062-calling-java-from-javascript

Please correct me if i'm wrong. Thanks in advance.

Solution

Please make sure that you load required web page before you access its JavaScript and register Java objects. For example:

browser.addLoadListener(new LoadAdapter() {
    @Override
    public void onFinishLoadingFrame(FinishLoadingEvent event) {
        if (event.isMainFrame()) {
            Browser browser = event.getBrowser();
            JSValue value = browser.executeJavaScriptAndReturnValue("window");
            value.asObject().setProperty("Account", new Account());
        }
    }
});

browser.loadURL("form.html");