How can I add localization to JFileChooser for a locale that is not supported by default?

Question

The list of supported locales for User Interface Translation does not have all the languages I need to support. How can I add more languages for a JFileChooser

Answer 1

In fact it is possible to use properties file to translate standard Swing strings. Just call

UIManager.getDefaults().addResourceBundle("com.mypackage.messages");

where com.mypackage.messages is a fully-qualified bundle base name.