[S90-JAVA] Avoid use of static in interface

[ggeoffroy68]

No description provided.

[ggeoffroy68]

Bad usage:
 

    public interface Color {
        public static final int RED = 0xff0000;// Noncompliant
        public static final int BLACK = 0x000000;// Noncompliant
        public static final int WHITE = 0xffffff;// Noncompliant
    }

Good usage:

    public enum Color {
        RED,// Compliant
        BLACK,// Compliant
        WHITE;// Compliant
    }

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
4 Code Smells

83.3% Coverage
0.0% Duplication

[dedece35]

Hello @ggeoffroy68,
I have questions about this new rule.
I agree with you public static final keywords are useless. For example, we can have an interface with variables like int RED = 0xff0000;.
But why is it a "green" rule ?
And why enum usage is better that an interface with variables ? maybe one enum is better of one interface + 3 variables ?
Do you have a scientific paper about this subject ?

thank you.

[dedece35]

Hi @ggeoffroy68 ,
we are migrating this repo to a new one : please see green-code-initiative/ecoCode#7