java.util.zip not handling Unicode filenames
... internally, with (afaik) no defined charset, or Unicode encoding. That means that the writer and reader of the file have to agree on a mutually ... some low-level JVM stuff (principally the JNI interface, and JVM classfile ...
http://www.javakb.com/Uwe/Forum.aspx/java-programmer/21593

Class Files and Class Loading in NT and UNIX
... the request and the relative speeds of the reader, the writer ... to byte order. The byte order used in the classfile is well defined, i.e. it doesn't just use host byte order. Perhaps you could
http://www.javakb.com/Uwe/Forum.aspx/java-programmer/1759

platform's default charset ?
... for how to specify a different encoding for Reader/Writer see http://mindprod.com/jgloss/conversion  for how to specify a ... external interfaces/ to the JVM, notably JNI and the classfile ...
http://www.javakb.com/Uwe/Forum.aspx/java-programmer/23971