Interfaces vs. enums

Question

Between interfaces and enums, which is better for declaring constants? Why is it so?

Answer 1

Just a code :

public interface InterfaceForConstants() {
    String **TOTO** = "Et voilà !";
    double **PI** = 3.14159265358979323846;
}

Using :

class ClasseName implements InterfaceForConstants () {

    String myString;

    if (myString.equals(**TOTO**) {
        // do something
    }

    double circumference = **PI** * diameter; // instead of MathConstants.PI * diameter;

}

Clean and simple. If something can do what you need, take the simplest one! Writing code by the rules is good, writing code that is easy to read is better, even if a rule is not respected. Think about when you have to read your code after a few months. If you want to be more specific, make a javadoc to explain it!