JDatePicker jar 找不到本地 en_GB?

JDatePicker jar can't find local en_GB?

我尝试在 eclipse 项目中使用 java.util.Locale 时出现错误:

$Can't find bundle for base name i18n, locale en_GB

Exception in thread "AWT-EventQueue-0" java.util.MissingResourceException: 
Can't find bundle for base name i18n, locale en_GB at 
java.util.ResourceBundle.throwMissingResourceException(Unknown Source) at 
java.util.ResourceBundle.getBundleImpl(Unknown Source) at 
java.util.ResourceBundle.getBundle(Unknown Source)

我该如何解决这个问题?

它从哪里得到 en_GB

Java 中的语言环境使用破折号,而不是下划线(即 en-GB)。

完整列表请参阅 Java 8 supported Locales