You can also modify the body of this method to customize your error messages.
For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not
of end-users concern, so you can return something like :
"Internal Error : Please file a bug report .... "
from this method for such cases in the release version of your parser.
the detail message string of this Throwable instance (which may be null).
protected static String LexicalErr(boolean EOFSeen,
Returns a detailed message for the Error when it is thrown by the
token manager to indicate a lexical error.
EOFSeen : indicates if EOF caused the lexical error
curLexState : lexical state in which this error occurred
errorLine : line number when the error occurred
errorColumn : column number when the error occurred
errorAfter : prefix that was seen before this error occurred
curchar : the offending character
Note: You can customize the lexical error message by modifying this method.