code: public void initImpl()
    {
      if (_level == null) {
        return;
      }
      
      if (_names.size() == 0) {
        _names.add("");
      }
      
      for (String name : _names) {
        _logger = Logger.getLogger(name);
      
        if (_level != null) {
          _logger.setLevel(_level);
        }
  
        if (_useParentHandlers != null) {
          _logger.setUseParentHandlers(_useParentHandlers.booleanValue());
        }
      
        for (Handler handler : _handlerList) {
          _logger.addHandler(handler);
        }
      
        if (_filter != null) {
          _logger.setFilter(_filter);
        }
      }
    }
docs: Should be run with system classloader