What is virtual method calling in java?

Question

Ive saw the next paragraph in some computer science test and i\'ll hope i can get here a good explanation of what it means because i googled it for an hour and can\'t find a

Answer 1

The author of these lines used the c++ terminology of virtual.

A better terminology is dynamic binding / dynamic dispatch.

That means, that the object's dynamic type is "chosing" which method will be invoked, and not the static type.

For example: [pseudo code]:

class A {
  public void foo() { }
}
class B extends A { 
  public void foo() { }
}

when invoking:

A obj = new B();
obj.foo();

B.foo() will be invoked, and NOT A.foo(), since the dynamic type of obj is B.