CustomLoggerToFile

SomewhereInMain.java

private static Logger initLogger() {
        try {
            logger = Logger.getLogger("EasyLogger");

            File logFolder = new File(dataFolder.toFile(), "Logs");
            if (!logFolder.exists())
                logFolder.mkdirs();
            File logFile = new File(logFolder, new SimpleDateFormat("MM-dd-yyyy").format(Calendar.getInstance().getTime()) + ".log");
            if (!logFile.exists())
                logFile.createNewFile();
            FileHandler logHandler = new FileHandler(logFile.getPath(), true);
            logHandler.setFormatter(new Formatter() {
                @Override
                public String format(LogRecord record) {
                    SimpleDateFormat logTime = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
                    Calendar cal = new GregorianCalendar();
                    cal.setTimeInMillis(record.getMillis());
                    return logTime.format(cal.getTime())
                            + " | "
                            + record.getLevel()
                            + " | "
                            + record.getSourceClassName().substring(
                            record.getSourceClassName().lastIndexOf(".")+1)
                            + "."
                            + record.getSourceMethodName()
                            + "() : "
                            + record.getMessage() + "\n";
                }
            });
            if (production)
                logger.setUseParentHandlers(false);
            logger.addHandler(logHandler);
            return logger;
        } catch (IOException ignored) {}
        return null;
    }