java.util.logging: how to suppress date line

Question

I'm trying to suppress output of the date line durinng logging when using the default logger in java.util.logging. For example, here is a typical output:

Jun 1, 2010 10:18:12 AM gamma.utility.application info

INFO: ping: db-time=2010-06-01 10:18:12.0, local-time=20100601t101812, duration=180000

Jun 1, 2010 10:21:12 AM gamma.utility.application info

INFO: ping: db-time=2010-06-01 10:21:12.0, local-time=20100601t102112, duration=180000

I would like to get rid of the Jun 1, 2010... lines, they just clutter my log output. How can I do this?

Answer 1

From Java SE 7 there is a new system property: java.util.logging.SimpleFormatter.format.

The same property is also configurable on the java.util.logging properties file (logging.properties). If you are an Eclipse user, and you are annoyed by the double line message in the console output, you could change the jre logging.properties file (JDK_HOME/jre/lib/logging.properties) in this way:

java.util.logging.SimpleFormatter.format=%4$s: %5$s [%1$tc]%n

Some example format is available here: http://docs.oracle.com/javase/7/docs/api/index.html?java/util/logging/SimpleFormatter.html.

Answer 2

The problem is caused by a handler in the parent log. The solution is to remove all handlers from the parent log, and then add own custom handler. This code removes handlers from the parent log:

      for(Handler iHandler:log.getParent().getHandlers())
        {
        log.getParent().removeHandler(iHandler);
        }