public char skip(int n){
  _pos+=n;
  if (_length <= _pos) {
    _pos=_string.length();
    return DONE;
  }
 else   return _string.charAt(_pos);
}

public char skip ( int n ) { _pos += n ; if ( _length <= _pos ) { _pos = _string . length ( ) ; return DONE ; } else return _string . charAt ( _pos ) ; }
skips the next n characters
