From version 1.0.1, the project ships with SLF4J-Simple -- see SLF4J's manual for more details on binding. Also the SimpleLogger JavaDoc describes all the options used to configure this logger, however the following paragraphs will give you some pointers to using this logger with this tool.
The simplest way to enable logging is to set the org.slf4j.simpleLogger.defaultLogLevel to say "debug" or "trace" in the command line -- like this:
Since SLF4J-Simple dumps out everything to System.err , you can use simple output redirection if you want the logging info to be dumped into a file -- for instance in the above example, you would use this construct to dump out all the logging to file logdebug.txt :
See this page on redirecting output if you're using bash as your shell: http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO-3.html .
However, SLF4J-Simple allows you to specify a file via property org.slf4j.simpleLogger.logFile system property -- so you can achieve the same as the above by using this: