Logging Tutorials

Logging can be used to keep track of what an application is doing during its execution. Different types of data can be logged, and the data can be output in a variety of formats and to a variety of different locations. Log4J is a very popular logging utility for Java.
  1. What is Log4J and how do I use it?
  2. How do I configure Log4J with properties?
  3. How do I initialize Log4J in a web application?
  4. How do I change my Log4J settings while my web application is running?
  5. How do I remove the Tomcat INFO console messages at start-up?