SL4J

Logging facade, which hides the actual logging library being used.

Usage

public class LoginHandler {

   private static final Logger LOGGER = LoggerFactory.getLogger(LoginHandler.class);

   public void login(String user) {
      LOGGER.debug("User {} logged in", user);
   }

}

Logging Levels

Levels are defined by the Logger interface.

• Trace

• Debug

• Info

• Warn

• Error