JUL FileHandler Sınıfı

Örnek

Şöyle yaparız

private static final Logger LOGGER = Logger.getLogger(JULExample.class.getName());

public static void main(String[] args) {
  LOGGER.setUseParentHandlers(false); // Disable default console handler
  ConsoleHandler consoleHandler = new ConsoleHandler();
  consoleHandler.setLevel(Level.INFO);
  LOGGER.addHandler(consoleHandler);

  try {
    FileHandler fileHandler = new FileHandler("mylog.log", true);
    fileHandler.setFormatter(new SimpleFormatter());
    fileHandler.setLevel(Level.WARNING);
    LOGGER.addHandler(fileHandler);
  } catch (IOException e) {
    LOGGER.severe("Failed to create log file: " + e.getMessage());
  }

  LOGGER.info("Starting application...");

  try {
    int result = 10 / 0;
  } catch (ArithmeticException e) {
    LOGGER.log(Level.SEVERE, "An error occurred", e);
  }

  LOGGER.warning("this is a warning message");
  LOGGER.info("Application finished.");
}