[antlr-interest] Lexing question

[John Ridgway]

So I'm parsing Java and the JLS has some interesting rules about  
tokens.  Specifically a Java identifier begins with a "JavaLetter"  
followed by zero or more "JavaLetterOrDigit"s.

A "JavaLetter" is a character for which the method  
Character.isJavaIdentifierStart(int) returns true.  A  
"JavaLetterOrDigit" is a character for which the method  
Character.isJavaIdentifierPart(int) returns true.  How do I specify  
that in ANTLR (v3)?

Peace
- John