Exception while using slf4j-log4j13 ???

[Michael Bauroth]

Hi,

I figured out an exception while calling CharsetUtil.getDefaultCharset. 
It took me a while until I found out, that the call of 
LoggerFactory.getLogger( CharsetUtil.class ) failed. I've used the jar 
slf4j-log4j13. After replacing it with slf4j-simple all works fine.
Now my question: What is the difference?
Regards
Michael