LOG4J "install": [amennyiben nem mukodne..]
Eclipse-ben > jobbclick a projectre > Properties
Java Build Path > Libraries Add Library > User Library > User Libraries New > (nevnek log4j1.2.17_) kijelol > Add External Jars.. kivalasztod a ./apache-log4j-1.2.17/log4j-1.2.17.jar -t OK OK OK OK ..