Can a constructor be final?

Answer 1

No!
Since every class has it's own constructor, you can't really override constructors anyway, so final would do nothing. (If you don't ever write a constructor for a class, Java generates an empty one!)

If you want to make it so you can't extend a class, you can make the class itself final.

You can also make constructors private if that is what you want.

Answer 2

ya final keyword is like constant so u can't inherit the constructor

Answer 3

what is null?