[Solved] Create an instance of subclass inside superclass

ngongocthinh123 Asks: Create an instance of subclass inside superclass
Whenever i create an instance of superclass, i want it automatically creates 1 instance of the subclass. Then i can call the subclass from an instance of the superclass. Here i have a superclass name “SortArticles”:

Code:
public class SortArticles {
private String title;
private String linkToFullArticles;
private FullArticle fullArticleObject;

public FullArticle getFullArticleObject() {
    return this.fullArticleObject;
} 
}

Here i have a subclass name “FullArticle”:

Code:
public class FullArticle extends SortArticles {
private List<Label> labelList;
}

i want to call like this:

Code:
ArrayList<SortArticles> sortList = new ArrayList<>();
sortList.add(new SortArticles());
sortList.get(0).getFullArticleObject().getTitle;

It’s possible to do that? I think of using hashmap to link sort and full, but i need create 2 arraylist, and link it manually :)

Ten-tools.com may not be responsible for the answers or solutions given to any question asked by the users. All Answers or responses are user generated answers and we do not have proof of its validity or correctness. Please vote for the answer that helped you in order to help others find out which is the most helpful answer. Questions labeled as solved may be solved or may not be solved depending on the type of question and the date posted for some posts may be scheduled to be deleted periodically. Do not hesitate to share your response here to help other visitors like you. Thank you, Ten-tools.