Question

I have two classes A and B. B extends A. Now, in B, can I create an array list of objects of A.

---

public class A {

      // class fields
      // class methods  
}

---

import java.util.*;

public class B extends A {

List<Object> listname=new ArrayList<Object>();

A obj=new A();
listname.add(obj);
 }

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Can I create an array list of objects at all ? By the way, above code gives error !

Answer 1

Yes, I see no reason you cannot create an ArrayList of an object A.

But you can’t do it the way you are doing it, you must do it in a method. You’re trying to do it in the field declarations.

Try maybe adding it in the constructor?

So something like

public B() {
A obj=new A();
listname.add(obj);
}

Or maybe I just don’t understand your question and I’m completely wrong.