Let's start with Log4j. First, download log4j library and add log4j-1.2.16.jar into classpath.
Create log4j.properties file, which will contain log4j configuration and put it into project. It may look like this:
log4j.rootLogger=DEBUG, A1
log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=[%c{1}][%p]:
%m%n
