Java let me define a static method in an interface

Question

public interface B { String iname = "TBA"; int iid = 0; public static void main(String[] args) { System.out.println("Hello"); } public static void goForIt() { System.out.println("Went for it"); } public void doSomething(); }

And now...

public class D { public static void main(String[] args) { B.goForIt(); } }

This successfully printed "Went for it". I was told that interfaces cannot have static methods though. So, what's going on here? However, when I have a class implement B, then the static method doesn't work.

It changes a whole host of things. In fact, it changes so many things that reading literature on anything pre Java 8 is probably not a good idea. — Boris the Spider
– Boris the Spider, Commented Mar 9, 2015 at 20:16
@BoristheSpider Yes. Design simple imperative language with garbage collector -> get mindshare based on easy learning curve -> add generics -> add lambdas -> now a functional programming language with mindshare — Atsby
– Atsby, Commented Mar 9, 2015 at 20:22

Community · Accepted Answer · 2020-06-20 09:12:55Z

Java 8 has introduced the ability to have static methods in interfaces.

Enhancements in Java SE 8

... In addition, you can define static methods in interfaces.

But static methods are still not inherited, either from implementing an interface or from a superclass.

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