java.util.logger simple example

logger.java

    private final static Logger LOGGER = Logger.getLogger(Main.class.getName());
    private static void setupLogger(){
        FileHandler fileTxt = null;
        try {
            fileTxt = new FileHandler("runtime.log");
        } catch (IOException ignored) {}
        SimpleFormatter formatterTxt = new SimpleFormatter();
        fileTxt.setFormatter(formatterTxt);
        LOGGER.severe("Severe Log");
        LOGGER.addHandler(fileTxt);
        LOGGER.warning("Warning Log");
        LOGGER.info("Info Log");
        LOGGER.finest("Finest");
    }