[antlr-interest] Is there option or way to control the accessibility of generated methods or classes in Java?

[Rice Yeh]

Hi,
  Antrl generat methods or classes from grammer files as public. Is
there option or way to control the accessibility of generated methods
or classes in Java? I want to encapsule the generated classes in my
case. Otherwise, the users of my compiler are intented to use the
wrong methods.

Regards,
Rice