log4j is a repable, fast and flexible logging framework (APIs) written in Java, which is distributed under the Apache Software License. log4j is a popular logging package written in Java. log4j has been ported to the C, C++, C#, Perl, Python, Ruby, and Eiffel languages.

Audience

This tutorial has been prepared for beginners to help them understand the basic functionapty of log4J logging framework.

Prerequisites

As you are going to use Log4J logging framework in various Java-based apppcation development, it is imperative that you should have a good understanding of Java programming language.