(Logback | Set log level programmatically).java

    public static void main(String[] args) {
        ch.qos.logback.classic.Logger rootLogger = (ch.qos.logback.classic.Logger)LoggerFactory.getLogger(ch.qos.logback.classic.Logger.ROOT_LOGGER_NAME);
        rootLogger.setLevel(Level.toLevel("trace"));
        Logger logger = LoggerFactory.getLogger("Test");
        if(!LOGGER.isDebugEnabled()){
            LOGGER.info("BLA BLA INFO");
        }
        LOGGER.debug("BLA BLA DEBUG");
    }