Java constant variable, naming convention [duplicate]

Question

Is there any naming convention for java constant variable?
Normally we use variables with names containing uppercase letters and underscores(_).

For example:

public final class DeclareConstant {      public static final String CONSTANT_STRING = "some constant";      public static final int CONSTANT_INTEGER = 5;  } 

Answer 1

Yes. That is it. It is often used for enum as well.

The only common exception is for logging where you might see

private static final Logger log = Logger.getLogger(getClass().getName()); 

but I prefer LOG

I often write this as UPPER_CASE, but I also write TitleCase for classes and camelCase for variables and methods.

Answer 2

That is right. According to Sun:

Scroll to the bottom see constants

Constants

The names of variables declared class constants and of ANSI constants should be all uppercase with words separated by underscores ("_"). (ANSI constants should be avoided, for ease of debugging.)

static final int MIN_WIDTH = 4;

static final int MAX_WIDTH = 999;

static final int GET_THE_CPU = 1;