Java: log4j Initialization Example

thitiv (Thiti V. Sintopchai) — Mon, 14 May 2007 09:44:45 GMT

// Initialization for Basic Console Output
// Ref: http://logging.apache.org/log4j/docs/manual.html



 import com.foo.Bar;



 // Import log4j classes.

 import org.apache.log4j.Logger;

 import org.apache.log4j.BasicConfigurator;



 public class MyApp {



   // Define a static logger variable so that it references the

   // Logger instance named "MyApp".

   static Logger logger = Logger.getLogger(MyApp.class);



   public static void main(String[] args) {



     // Set up a simple configuration that logs on the console.

     BasicConfigurator.configure();



     logger.setLevel(Level.DEBUG); // optional if log4j.properties file not used

     // Possible levels: TRACE, DEBUG, INFO, WARN, ERROR, and FATAL



     logger.info("Entering application.");

     Bar bar = new Bar();

     bar.doIt();

     logger.info("Exiting application.");

   }

 }

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Java: log4j Initialization Example