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copied!<p>You can use a <a href="http://docs.oracle.com/javase/1.4.2/docs/api/java/util/logging/Handler.html" rel="nofollow">Handler</a> subclass to process the data being logged.</p> <p>Then you can add it to your root logger via your config file or programmaticaly via the <code>addHandler</code> method of Logger class.</p> <p>For example you can create a Handler subclass FoobarHandler that print all logged data on the console prefixed with a "Foobar " text:</p> <pre><code>public class MyHandler extends Handler { @Override public void close() throws SecurityException { // housekeeping before handler close } @Override public void flush() { // not really needed as data is processed without any sort of buffering } @Override public void publish(LogRecord record) { System.out.println("Foobar " + record.getMessage().toUpperCase()); } } </code></pre> <p>In your config file you add the class name (i.e. <code>myapp.FoobarHandler</code>) of your Handler to the global handlers config:</p> <pre><code># Global logging properties. # ------------------------------------------ # The set of handlers to be loaded upon startup. # Comma-separated list of class names. # (? LogManager docs say no comma here, but JDK example has comma.) handlers=java.util.logging.FileHandler, myapp.FoobarHandler # Default global logging level. # Loggers and Handlers may override this level .level=INFO # Loggers # ------------------------------------------ # Loggers are usually attached to packages. # Here, the level for each package is specified. # The global level is used by default, so levels # specified here simply act as an override. myapp.ui.level=ALL myapp.business.level=CONFIG myapp.data.level=SEVERE </code></pre>

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