Javafx Internationalization with custom language

Question

I\'m developing a JavaFX application with multiple language support. My app sometimes shows an alert box, for example:

package application;
    
import java.u         


        

Answer 1

I am very upset that the JRE inside very few exotic languages. And this is a big problem. I've been looking for a solution, I created an open source project which demonstrates how to add new languages resources in this project.

Project on GitHub

I translated the system controls JavaFX into a new language (be-BY, ru-RU):

Structure of my project:

java
    |------ com\krasutski\language\Messages.java
    |------ com\krasutski\util\PropertyLoader.java
    |------ com\krasutski\util\ReflectionUtils.java
    |------ com\krasutski\view\MainController.java
    |------ com\krasutski\MainApp.java
resources
    |------ com\sun\javafx\scene\control\skin\resources\controls_be_BY.properties
    |------ com\sun\javafx\scene\control\skin\resources\controls_ru.properties
    |------ fxml\main.fxml
    |------ icons\app-128x128x32.png
    |------ messages\messages.properties
    |------ messages\messages_be_BY.properties
    |------ messages\messages_ru.properties
    |------ styles\styles.css

the solution to the problem is in 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;
    }
}

An example slice file controls_be_BY.properties

# encoding=utf-8
# ProgressIndicator, the string that's displayed at 100%
ProgressIndicator.doneString=Гатова

# ListView
ListView.noContent=Няма змесціва

# TableView
TableView.noContent=Няма змесціва ў табліцы
TableView.noColumns=Няма калонак ў табліцы

Here you don't need to use a special character \u you just write to any text editor which supports Unicode.

You can add your exotic languages folder resources/com/sun/javafx/scene/control/skin/resources of this project. Send me your controls_*.properties and I'll add them to this project.

Ready assembled example you can download in the releases section