JAVA

java logger

private static final Logger LOGGER = Logger.getLogger( ClassName.class.getName() );

logging in java

Logging is the process of writing log messages during the execution of a 
program to a central place.This logging allows you to report and persist
error and warning messages as well as info messages (e.g., runtime 
statistics) so that the messages can later be retrieved and analyzed.

logging in java

In computing, a log file is a file that records either events that 
occur in an operating system or other software runs, or messages between 
different users of a communication software. Logging is the act of 
keeping a log. ... Many operating systems, software frameworks and 
programs include a logging system.

Java Logger

Logger logger = Logger.getLogger("newLoggerName");