Where to place log4j.xml

Question

How can we specify were log4j has to look at when trying to find its xml configuration file ?

It seems that by default, log4j looks into the root of a class folder,

Answer 1

I don't have any error

So log4j is finding your configuration, otherwise you would get:

log4j:WARN No appenders could be found for logger ().
log4j:WARN Please initialize the log4j system properly.

Also:

The log are just printed out on the console

So that means that you probably need to define a file appender, like FileAppender or RollingFileAppender. The "Configuration" section on the short intro has a few examples.