Menu
My question: Should names of constant Java variables (within methods) be upper-case?
I've always been under the impression that
a) if a variable is never going to change, it should be declared final (to show/enforce that it won't change) b) it should be named in upper-case
However, I've noticed in eclipse, when changing a variable (within a method) to be final/constant, and subsequently refactoring/renaming it to something like below:
final int NODE_COUNT = 3;
I get the following warning:
This name is discouraged. According to convention, names of local variables should start with a lowercase letter.
Which makes me wonder if the upper-case rule doesn't apply in this instance (i.e. final variable within a method).
938
The names of variables declared class constants and of ANSI constants should be all uppercase with words separated by underscores ("_").
"Constants can be declared with uppercase or lowercase, but a common convention is to use all-uppercase letters." According to MDN: NOTE: Constants can be declared with uppercase or lowercase, but a common convention is to use all-uppercase letters."
Java uses CamelCase as a practice for writing names of methods, variables, classes, packages, and constants.
To make any variable a constant, we must use 'static' and 'final' modifiers in the following manner: Syntax to assign a constant value in java: static final datatype identifier_name = constant; The static modifier causes the variable to be available without an instance of it's defining class being loaded.
Within methods you don't have constants, you just have local variables, that can be final. So using normal camelCase starting with lowercase is perfectly suiting there.
110
Class constants should also be static (making them class-level instead of instance-level), in which case Eclipse will not warn you about using Uppercase.
Method constants should have identifiers starting with a lower-case letter, though, so I agree with your conclusion.
25
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
