TIOBE - Java Coding Standard

Rule: JavaLogging2

Synopsis:	The Logger variable declaration does not contain the static and final modifiers
Language:	Java
Severity Level:	4
Category:	JavaLogging

Description:

In most cases, the Logger can be declared static and final.

class Foo{
    Logger log = Logger.getLogger(Foo.class.getName());
    // It is much better to declare the logger as follows 
    // static final Logger log = Logger.getLogger(Foo.class.getName());
}