SLF4J or log4j

Hi, which logging mechanism would you prefer based upon your past experience. I recently heard about SLF4J that its better than log4j, but would like to hear from you.

Thanks

I agree with you, because the slf4j is more flexible tools, you can integrate it with other logger tools and include log4j too.

Thanks. How about commons logging?

So Do you have special questions? I repeat slf4j can integrate other loggers tools
SLF4J Manual

Petr, No specific questions as such. Just wanted to be clear among these 3 logging tools. In what case would someone like to integrate one logger tool with another?

I took part in many big projects and usually we use log4j for logger tools. because log4j have many modules console, file, database, email, and you can create yourself append.
But In opensource projects usually use slf4j, because when you use this library in your projects you can just change loggers tools add need integrate library.