[antlr-interest] Error for class ANTLRInputStream

[Borneq]

>                ANTLRInputStream input = new ANTLRInputStream(System.in);
>
> I debug. can step over ANTLRFileStream but on ANTLRInputStream is
> exception ClassNotFoundException.
> I don;t know why can find one class and can't find second
>

I think error is not ClassNotFoundException but read System.in ?