Comma constant in internal library

Question

I want to use constant char/string comma (,) in my code.

Where I can find static final variable in standard library? If there is not such a place, can you point me popular external library for that?

EDIT: I don't want to create my own constant, I want to use it from JDK (or external library if it not exists)

You want what? Why don't you just declare a constant yourself? — Axel, Apr 03 '17 at 07:21

score 4 · Accepted Answer · edited May 23 '17 at 12:10

What would be the benefit of depending on an external library for just a constant? If your not using code from that library I would advise to define the constant in your own project.

If you use the comma-constant all over the place in your code try to find a common interface/class and define the constant in that interface/class.

If there is no common interface/class create an enum with a logical name. Do not create a class or interface just for wrapping a constant.

If you need the comma-constant in a single class declare it in that class. (either protected or private).

See also What is the best way to implement constants in Java?

But if you really want to use a third-party library, you might want to look at: https://github.com/google/caja/blob/master/src/com/google/caja/lexer/Punctuation.java

I know how implement constant and I don't want to know why it is wrong or good to create own constant. I asked WHERE I can find that literal in JDK or external library. — ByeBye, Apr 03 '17 at 07:32
Well, look at the last paragraph that was added. There it is now. — domsson, Apr 03 '17 at 07:42

score -1 · Answer 2 · edited Oct 20 '20 at 16:13

-1

You can use this:

import sun.tools.java.Constants;

Constants.opNames[Constants.COMMA]

edited Oct 20 '20 at 16:13

Topera

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answered May 25 '19 at 06:45

easonjim

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Depending on internal sun packages to avoid deduplicating comma is BAD. – tapasvi Jan 21 '21 at 22:52

Comma constant in internal library

2 Answers2