Call Child class method from Parent class method

Question

Consider the following case

class A
{
    X()
    {
        //some code
        Y();
    }
}

class B extends A
{
    Y(){ //some code }
}

If I create an object of the class B, and i try to use function X as it is extended from A, is it possible that the function X can access the function Y of the calling object of class B.

Answer 1

you could but this must be met

1. A class is abstract
2. Y method is abstract too

---

Example:

abstract class A {
    void X() {
        Y();
    }

    abstract void Y();
}

class B extends A {
    @Override
    void Y() {
        System.out.println("Hello from B class");
    }
}

in that form every time class A calls Y, it will actually invoke an implememted method of the abstract method Y