Using Apache's log4j library - how to?

• Download the jar file from http://logging.apache.org/log4j/1.2/download.html.
• Include it in the classpath by  referencing it in the project as shown below..

• Create a properties file "log4j.properties" (same as this file name) with following contents.

• Write a simple class like this..

• Wherever you create a new class just add the static member "logger" to your class, and start using it.

• Start writing the log statements.

• Collect all your log statements in your log file (as well as the console because of stdout in the properties file).

• Thats it!! Enjoy debugging complex interleaving scenarios between multiple threads. You can use Notepad++ for filtering and using such log files when they are too big to browse through.

References:

1. http://www.laliluna.de/articles/log4j-tutorial.html
2. http://logging.apache.org/log4j/1.2/download.html
3. http://en.wikipedia.org/wiki/Log4j