URL-encode international characters in Java?

Hi all,
 
Is there a standard way to URL-encode non-English characters in Java? For
example, I know that '?' is URL-encoded as '%3F', but I don't know how or if
Big-5 characters can be URL-encoded. I've experimented a bit, and found that
IE will encode things differently based on the charset of the HTML doc which
contains the form.
 
Ideally, I'd like to use functionality available in Java Servlets, or
another Java code library, but any solutions would be much appreciated. I've
looked at Java's java.net.URLEncoder class, but it's encode() method won't
do it, as documented in the JDC's bug database (
http://developer.java.sun.com/developer/bugParade/bugs/4257115.html
<http://developer.java.sun.com/developer/bugParade/bugs/4257115.html> ).
 
Is the only known solution to write my own encoder? If so, where can I find
a list of the character's that *don't* need to be encoded? Is it just
[A-Za-z0-9_]?
 
Thanks,
Lenny Turetsky