对于未安装XComposite扩展名的Linux系统，这是一个已知问题:

It's a known issue for Linux systems without XComposite extension installed: https://javafx-jira.kenai.com/browse/RT-19700

不幸的是，您需要安装XCompoiste扩展才能使用透明性来处理JavaFX应用程序.

Unfortunately you need to install XCompoiste extension to work with JavaFX applications using transparency.