Question

I have been developing android applications for about 1 month now I am getting pretty familiar with the Java syntax but today I stumbled upon this piece of code :

try {
    Class<? extends ContactAccessor> clazz =
                      Class.forName(className).asSubclass(ContactAccessor.class);
    sInstance = clazz.newInstance();
} catch (Exception e) {
    throw new IllegalStateException(e);
}

Could somebody explain me what this Class<? extends ContactAccessor> clazz does?

Answer 1

It means you have a Class which is ContactAccessor class or a sub class of that class or interface.

Since you have ContactAccessor.class already, I would assume you have a sub class.