The Logger Factory is generally a utility method (static) giving you a logger instance.
Most of the time, it looks like this:
final Logger logger = LoggerFactory.getLogger(...);// orfinal Logger logger = Logger.getLogger(...);
The Logger Factory is either a specific class or the Logger class itself depending on the logging framework, but in all cases, it gives you a Logger instance. The parameter of this factory method can change, but generally leads to a String (a lot of libraries allow a Class shortcut) which can be used to configure the log level as we saw earlier in the JUL configuration file.
Why do logger frameworks need a factory and why don't they allow you to instantiate the logger yourself with a plain new? Because ...
