code: public synchronized static void setFormatter(Formatter formatter) {
        java.util.logging.Logger root = java.util.logging.LogManager.getLogManager().getLogger(StringUtils.EMPTY);
        for (Handler h : root.getHandlers()) {
           h.setFormatter(formatter);
        }
     }
docs: Sets the formatter to use for all handlers.
  
  @param formatter the formatter to use