Advantage of log4j

Question

What\'s the advantage of log4j over set System.out and System.err to output to a log file?

Answer 1

Log4j offers the ability to rotate your log files based on size and delete them based on quantity (logrotate), so your servers don't fill up their disks. Personally I think that is one of the more valuable features in Log4j.

Also Log4j is popular and understood by many developers. The last three companies I've worked at have all used Log4j in most projects.