*Recreation step : *
javadoc -docencoding "use non-ascii encoding" HelloWorld.java
say ,
jdk1.8.0\bin\javadoc.exe -docencoding Cp930 -d docencoding3 HelloWorld.java

*Explanation :*
The stylesheet.css is not getting generated in the proper encoding as in the code the configuration.docencoding is not getting passed to the output stream .
while this scenario works in JDK 6 [as confirmed in Java 6u14] , below changeset seems to have regressed this when adding new copyFile method.

Changeset:
792 (ffbf2b2a8611) 7006270: Several javadoc regression tests are failing on windows

[removed]

Thanks and Regards,
Jayashree V