জাভা abstract অবজেক্ট ওরিয়েন্টেড প্রোগ্রামিং

public class Main {

  static abstract class User {

    public String name;
    public String land;

    public User(String name, String land) {
      this.name = name;
      this.land = land;
    }
  }

  static class Author extends User {

    public Author(String name, String land) {
      super(name, land);
    }
  }

  public static void main(String[] args) {

    Author user = new Author("আরিফ", "বাংলাদেশ");

    System.out.println(user.name);
    System.out.println(user.land);
  }
}