Anonymous extending a class and implementing an interface at the same time?

Question

Suppose I have an interface called Interface, and a concrete class called Base, which, to make thing a bit more complicated, has a ctor that requires some arguments.

I'd like to create an anonymous class that would extend Base and implement Interface.

Something like

 Interface get()
 {
     return new Base (1, "one") implements Interace() {};
 }

That looks reasonable to me, but it doesn't work!

(P.S: Actually, the Interface and Base are also generic classes :D. But I'll ignore that for now)

Answer 1

No, you can't do that with an anonymous class. You can create a named class within a method if you really want to though:

class Base {
}

interface Interface {
}

public class Test {
    public static void main(String[] args) {
        class Foo extends Base implements Interface {
        };

        Foo x = new Foo();
    }
}

Personally I'd usually pull this out into a static nested class myself, but it's your choice...