Freemarker I18n the hard way - Java side

I18n-hardway-java

public static Map<String, Object> getDataModel() {
  HashMap<String, Object> datamodel = new HashMap<>();
  datamodel.put("date", new Date());
  datamodel.put("time", new Date());
  datamodel.put("month", new Date());
  datamodel.put("boolean", true);
  datamodel.put("yes", getBundle().getString("yes"));
  datamodel.put("no", getBundle().getString("no"));
  datamodel.put("greeting", format(getBundle().getString("hello"), "Freemarker"));
  return datamodel;
}

public static ResourceBundle getBundle() {
  return ResourceBundle.getBundle(
    "de.oehme.examples.freemarkerI18n.hardway.messages",
    getLocale());
}

public static String format(String message, Object... args) {
  MessageFormat format = new MessageFormat(message, getLocale());
  return format.format(args);
}