Localizing JavaFx Controls

Question

I am trying add a ResourceBundle for my language for the JavaFx controls but am failing to do so.

I tried to add controls_fi_FI.properties in the classpath.. and hop

Answer 1

I created Simple "Hello, world!" example showing a ready to roll JavaFX project using multiple-language support is for those who need some more exotic language (be-BY, ru-RU etc.)

Here's how I solved the problem, it works for me

Messages.java

/**
 * The class with all messages of this application.
 */
public abstract class Messages {

    private static ResourceBundle BUNDLE;

    private static final String FIELD_NAME = "lookup";
    private static final String BUNDLE_NAME = "messages/messages";
    private static final String CONTROLS_BUNDLE_NAME = "com/sun/javafx/scene/control/skin/resources/controls";

    public static final String MAIN_APP_TITLE;

    public static final String DIALOG_HEADER;
    public static final String MAIN_CONTROLLER_CONTENT_TEXT;
    public static final String MAIN_CONTROLLER_HELLO_TEXT;
    public static final String MAIN_CONTROLLER_GOODBYE_TEXT;

    static {
        final Locale locale = Locale.getDefault();
        final ClassLoader classLoader = ControlResources.class.getClassLoader();

        final ResourceBundle controlBundle = getBundle(CONTROLS_BUNDLE_NAME,
                locale, classLoader, PropertyLoader.getInstance());

        final ResourceBundle overrideBundle = getBundle(CONTROLS_BUNDLE_NAME,
                PropertyLoader.getInstance());

        final Map override = getUnsafeFieldValue(overrideBundle, FIELD_NAME);
        final Map original = getUnsafeFieldValue(controlBundle, FIELD_NAME);

        //noinspection ConstantConditions,ConstantConditions,unchecked
        original.putAll(override);

        BUNDLE = getBundle(BUNDLE_NAME, PropertyLoader.getInstance());

        MAIN_APP_TITLE = BUNDLE.getString("MainApp.title");

        DIALOG_HEADER = BUNDLE.getString("Dialog.information.header");
        MAIN_CONTROLLER_CONTENT_TEXT = BUNDLE.getString("MainController.contentText");
        MAIN_CONTROLLER_HELLO_TEXT = BUNDLE.getString("MainController.helloText");
        MAIN_CONTROLLER_GOODBYE_TEXT = BUNDLE.getString("MainController.goodbyeText");
    }

    public static ResourceBundle GetBundle() {
        return BUNDLE;
    }
}

and in PropertyLoader.java

public class PropertyLoader extends ResourceBundle.Control {

    private static final String PROPERTIES_RESOURCE_NAME = "properties";

    private static final PropertyLoader INSTANCE = new PropertyLoader();

    public static PropertyLoader getInstance() {
        return INSTANCE;
    }

    @Override
    public ResourceBundle newBundle(final String baseName, final Locale locale, final String format,
                                    final ClassLoader loader, final boolean reload)
            throws IllegalAccessException, InstantiationException, IOException {

        final String bundleName = toBundleName(baseName, locale);
        final String resourceName = toResourceName(bundleName, PROPERTIES_RESOURCE_NAME);

        ResourceBundle bundle = null;
        InputStream stream = null;

        if (reload) {

            final URL url = loader.getResource(resourceName);

            if (url != null) {
                final URLConnection connection = url.openConnection();
                if (connection != null) {
                    connection.setUseCaches(false);
                    stream = connection.getInputStream();
                }
            }

        } else {
            stream = loader.getResourceAsStream(resourceName);
        }

        if (stream != null) {
            try {
                bundle = new PropertyResourceBundle(new InputStreamReader(stream, StandardCharsets.UTF_8));
            } finally {
                stream.close();
            }
        }

        return bundle;
    }
}

More I described here or on GitHub

Here is a demonstration in the Belarusian language: