Generics allows extending String class

[Akshay Sahu]

Hi,

If I write
Class TestGeneric<E extends String> {}

The compiler allows me to compile this. This shouldn't be allowed as final classes can neither be extended nor can be implemented.

I just want to know why is the compiler allowing that syntax to be valid.


Thanks and Regards,
Akshay Sahu

[Paul Clapham]

I don't agree that it shouldn't be allowed. Sure, the only value you can use for E is String itself, but writing a language specification which disallows that is really a waste of time. It just makes things more complicated, which means harder to test and more likely to have bugs.