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       Handler ch   new ConsoleHandler    ch setFormatter formatter   logger addHandler ch       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

User · Accepted Answer

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.

User · Answer

You must instruct your logger not to send its messages on up to its parent logger       import java util logging        Logger logger   Logger getLogger this getClass   getName     logger setUseParentHandlers false         However  this should be done before adding any more handlers to logger

User · Answer

This is strange but  Logger getLogger  global    does not work in my setup  as well as Logger getLogger Logger GLOBAL LOGGER NAME     However Logger getLogger     does the job well   Hope this info also helps somebody

User · Answer

Do a reset of the configuration and set the root level to OFF  LogManager getLogManager   reset    Logger globalLogger   Logger getLogger java util logging Logger GLOBAL LOGGER NAME   globalLogger setLevel java util logging Level OFF

User · Answer

Just do   LogManager getLogManager   reset

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

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