Does an interface have other fields than non compile time constants in Java?

Asked Apr 12 '19 at 19:52

Active Apr 12 '19 at 19:52

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I'm learning about interfaces from a udemy tutorial. And the instructor are saying that interfaces will be initialized only if one of its static method is accessed or one of its field that is a non compile time constant is accessed, and the field is initialized via a method or constructor.

I don't understand the second part of this phrase, the part with non compile time constant. I don't understand it because I know that an interface can have only public static final variables and these are non compile time constants. Isn't it? Does an interface have other fields than non compile time constants? Any feedback will be appreciated! Thank you!

asked Apr 12 '19 at 19:52

1

Not all final fields are compile time constants. – Sotirios Delimanolis Apr 12 '19 at 20:02
... but some are. – user207421 Apr 13 '19 at 00:08
The instructor is not entirely correct. An interface will also be initialized when it has `default` methods and a class implementing it is initialized. – Holger Apr 13 '19 at 12:11

Does an interface have other fields than non compile time constants in Java?

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