Why do we declare Loggers static final?

Question

In Java, why is it best practice to declare a logger static final?

private static final Logger S_LOGGER

Answer 1

static means that you only create one Logger per class, not one logger per instance of your class. Generally, this is what you want - as the loggers tend to vary solely based on class.

final means that you're not going to change the value of the logger variable. Which is true, since you almost always throw all log messages (from one class) to the same logger. Even on the rare occasions where a class might want to send some messages to a different logger, it would be much clearer to create another logger variable (e.g. widgetDetailLogger) rather than by mutating the value of a static variable on the fly.