Overiding Doubt

[Alejandro Rodriguez]

Hi,

I have a doubt regarding overriding.

If i have an object B that extends A and override a function (for example equals, or toString).

In a main function of a C class, if i have a instance of B , can i call the method of parent class?

Example:

public class Padre {
     public void print(){
        System.out.println("Padre!");
    }
}

public class Hija extends Padre {
    public void print(){
        System.out.println("Hija");
    }
}

public class test {
    public static void main(String[]args){
        Hija hija = new Hija();
//Here ,How can i call print method of padre?
        hija.print();
        Padre padre = new Hija();
       padre.print();
    }
}

[Andreas Svenkson]

You can't afaik. Instance methods are the specific method types that you override, like you just did, and which method is actually executed is dependant on the actualy runtime object type. Hence, even if you put your Hija object in a Padre reference variable, it would still use its Hija print() method. The only way to call it would be to add a call inside Hija's print() method, wuith super.print();

// Andreas

[anirudh jagithyala]

Supporting you answer.......its the runtime objects on which the methods to be called depends.
Check out your code rewritten.

public class test {   
    public static void main(String[]args){   
       //Here ,How can i call print method of padre?   
       Padre padre ;
       padre = new Hija();   
       padre.print();   //Override and calls the method from Hija class
       padre = new Padre();
     padre.print();   //here you call the method from Padre class
    }   
}  

[Ikpefua Jacob-Obinyan]

anirudh jagithyala wrote:Supporting you answer.......its the runtime objects on which the methods to be called depends.
Check out your code rewritten.


[code=java]
public class test {
public static void main(String[]args){
//Here ,How can i call print method of padre?
Padre padre ;
padre = new Hija();
padre.print(); //Override and calls the method from Hija class
padre = new Padre();
padre.print(); //here you call the method from Padre class
}
}

Hi Anirudh first of all thanks for your contribution.
The fact is Alejandro wanted to know how to invoke padre's print() method
ON HIJA'S OBJECT! according to the exact nature of his codes. AND one good way to do that is to create an instance method
in Hija's class that uses the keyword "super" to invoke padre's print method.