我如何在jdk9中获得sun.font的所有类

Question

I have my old codebase which currently uses java8 .

I am migrating my codebase to use jdk9-ea . But it looks like all the sun.font classes are now not available like the way they used to be earlier

error: package sun.font does not exist

More specifically i am using

• CompositeFont
• Font2D
• FontDesignMetrics
• FontManager
• FontManagerFactory
• SunFontManager

and more..

Answer 1

A feature of the module system is that it allows library developers to strongly encapsulate implementation details due to the new accessibility rules . In a nutshell, most types in sun.* and com.sun.* packages will no longer be accessible. This is in line with Sun and later Oracle stating that these packages are not meant for public consumption.

A workaround is to export these packages at compile and launch time with a command line flag:

--add-exports java.desktop/sun.font=ALL-UNNAMED

This exports the package sun.font from the module java.desktop to all modules including the unnamed module , which is the one that collects all classes on the class path.