Java “self” (static) reference

Question

I am looking for a \"self\" reference to the current class in JAVA in a static context manner like in PHP Scope Resolution Operator?

Solution: Break out of scope? BEWARE

Answer 1

You should not inherit logger. Just declare logger in each class.

But if you don't want do such useful think, just don't make it static)

Answer 2

The slightly faster

static final Logger LOG = LoggerFactory.getLogger(
       Thread.currentThread().getStackTrace()[0].getClassName());

If you do this 1000 times it will take 36 ms using Class.class.getName() and 60 ms doing it this way. Perhaps its not worth worrying about too much. ;)

Answer 3

You don't need to use any of those. What I find convenient to use is:
//Logger

private static final Logger logger = LoggerFactory.getLogger(CreateEmployeeRecord.class or this.class);

Do it in every class that needs logging, and change class name in bracket to corresponding class wherever it's being used.

Answer 4

I don't think there are any alternatives that are significantly different to the two in your question.

You could create a helper method like this:

public static String getCallingClassname() {
    return new RuntimeException().getStackTrace()[1].getClassName();
}

and then

static Logger LOG = LoggerFactory.getLogger(Helper.getCallingClassname());

but that's as expensive as the original version. (FWIW - 300 times as slow is probably not a major concern, unless you have thousands of these loggers. Each of these statics is initialized just once ...)

My personal preference is for the "old fashioned" way of doing it.