I just added the jar file downloaded to my external library. Do I need to do any configuration for apache.log4j library? What should I do to stop initialize the log4j system?
log4j:WARN No appenders could be found for logger (FaceRecognition).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Very Simple to add logging in Java See here. You need to set proper log4j properties file and its initialization in log4j class. See my mentioned link.