The modifiers must be on the function declarations, otherwise it would be impossible to call the functions given just the declarations. Since they must be on the declarations, it would be redundant to put them on the definitions as well. There’s no particularly good reason to disallow them (as long as they match the declaration), … Read more
From wikipedia In Java, all non-static methods are by default “virtual functions.” Only methods marked with the keyword final, which cannot be overridden, along with private methods, which are not inherited, are non-virtual.
Why would you declare a method as “virtual”. What is the benefit in using virtual?
From Wikipedia’s Virtual function … In object-oriented programming, in languages such as C++, and Object Pascal, a virtual function or virtual method is an inheritable and overridable function or method for which dynamic dispatch is facilitated. This concept is an important part of the (runtime) polymorphism portion of object-oriented programming (OOP). In short, a virtual function defines … Read more