How can I disable the default console handler, while using the java logging API?

Question

Hi I am trying to implement the java logging in my application. I want to use two handlers. A file handler and my own console handler. Both of my handlers work fine. My logging is send to a file and to the console . My logging is also sent to the default console handler, which i do not want. If you run my code you will see extra two line sent to the console. I don't want to use the default console handler. Does anyone know how to disable the default console handler. I only want to use the two handlers I have created.

Handler fh = new FileHandler("test.txt"); fh.setFormatter(formatter); logger.addHandler(fh); 

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Handler ch = new ConsoleHandler(); ch.setFormatter(formatter); logger.addHandler(ch); 

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import java.util.Date; import java.util.logging.ConsoleHandler; import java.util.logging.FileHandler; import java.util.logging.Formatter; import java.util.logging.Handler; import java.util.logging.Level; import java.util.logging.LogManager; import java.util.logging.LogRecord; import java.util.logging.Logger;  public class LoggingExample {     private static Logger logger = Logger.getLogger("test");      static {         try {             logger.setLevel(Level.INFO);              Formatter formatter = new Formatter() {                  @Override                 public String format(LogRecord arg0) {                     StringBuilder b = new StringBuilder();                     b.append(new Date());                     b.append(" ");                     b.append(arg0.getSourceClassName());                     b.append(" ");                     b.append(arg0.getSourceMethodName());                     b.append(" ");                     b.append(arg0.getLevel());                     b.append(" ");                     b.append(arg0.getMessage());                     b.append(System.getProperty("line.separator"));                     return b.toString();                 }              };              Handler fh = new FileHandler("test.txt");             fh.setFormatter(formatter);             logger.addHandler(fh);              Handler ch = new ConsoleHandler();             ch.setFormatter(formatter);             logger.addHandler(ch);              LogManager lm = LogManager.getLogManager();             lm.addLogger(logger);         } catch (Throwable e) {             e.printStackTrace();         }     }      public static void main(String[] args) {         logger.info("why does my test application use the standard console logger ?\n" + " I want only my console handler (Handler ch)\n " + "how can i turn the standard logger to the console off. ??");     } } 

Answer 1

Just do

LogManager.getLogManager().reset(); 

Answer 2

The default console handler is attached to the root logger, which is a parent of all other loggers including yours. So I see two ways to solve your problem:

If this is only affects this particular class of yours, the simplest solution would be to disable passing the logs up to the parent logger:

logger.setUseParentHandlers(false); 

If you want to change this behaviour for your whole app, you could remove the default console handler from the root logger altogether before adding your own handlers:

Logger globalLogger = Logger.getLogger("global"); Handler[] handlers = globalLogger.getHandlers(); for(Handler handler : handlers) {     globalLogger.removeHandler(handler); } 

Note: if you want to use the same log handlers in other classes too, the best way is to move the log configuration into a config file in the long run.