How to use slf4j with log4j2

[Paladox]

Hi, how do i use slf4j with log4j2 please? using it with log4j worked. but when 
i use it with log4j2 call getLoggers and it outputs, it shows no loggers other 
then the ones i define in a properties file. In log4j it showed the loggers 
even if they were not defined in a properties file.