Stopping inheritance without using final

Question

Is there any other method of stopping inheritance of a class apart from declaring it as final or by declaring its constructor as private?

Answer 1

Without using a final class, you can basically make all the constructors private:

public class A {
    private A() {} //Overriding default constructor of Java
}

Which although will also make this class abstract-ish by disallowing creating an object of this class, yet as any inheritance requires super(); in the constructor, and because the constructor is private, a compilation error will be the maximum you can get when one tries to inherit that class. Yet, I would recommend using final instead as it is less code and includes the option of creating objects.