android.content.res.XmlResourceParser

[Nidhi Sar]

I guess this is a basic java question, but I'm posting it here because the interface is an Android interface.

So I was looking at android.content.res.XmlResourceParser . Apparently, this is the definition in the online API on Android developer site:

public interface XmlResourceParser implements AttributeSet XmlPullParser

How is this possible? Is this an error?
How can an interface IMPLEMENT another interface (or two)? Shouldn't it EXTEND them?

[Ulf Dittmer]

What happened when you wrote a test case that contained both interface A and interface B that implements interface A?

[Rob Spoor]

You're right Nidhi, an interface cannot implement other interfaces but only extend them. I don't think this is a fault in the source code. Instead, the API doc generator seems to have a small bug in it, where it puts all "parent" interfaces into an "implements" list, even if the current class is an interface itself.

[Nidhi Sar]

Ulf Dittmer wrote:What happened when you wrote a test case that contained both interface A and interface B that implements interface A?

A compilation error ofcourse, as expected..... that's why this "official Google" documentation threw me off.

[Nidhi Sar]

Rob Spoor wrote:You're right Nidhi, an interface cannot implement other interfaces but only extend them. I don't think this is a fault in the source code. Instead, the API doc generator seems to have a small bug in it, where it puts all "parent" interfaces into an "implements" list, even if the current class is an interface itself.

Thanks Rob. I thought I was going crazy