Is this a valid Interface declaration?

[Jasper Vader]

interface Worker {
void perform_work();
}
... i found the above code in a mock exam... i thought that all methods in an interface need to be abstract?

[Sridhar Srikanthan]

Jasper,
all the methods in an interface are implicitly public and abstract. It doesnt matter even if you explicitly state them
Similarly, all variables in interfaces are implicitly public, static and final.
You might have got confused with abstract classes in which the declaration of abstract methods is explicitly done with the abstract keyword
Hope this Helps
Sri

[Jasper Vader]

cheers Sri, thanks for the clarification!