Here is Java Abstract Class solution - https://programmingoneonone.com/hackerrank-java-abstract-class-problem-solution.html

import java.util.*; abstract class Book{ String title; abstract void setTitle(String s); String getTitle(){ return title; }

} final class MyBook extends Book{ void setTitle(String title2){ this.title = title2; } } public class Main{

public static void main(String []args){
    //Book new_novel=new Book(); This line prHMain.java:25: error: Book is abstract; cannot be instantiated
    Scanner sc=new Scanner(System.in);
    String title=sc.nextLine();
    MyBook new_novel=new MyBook();
    new_novel.setTitle(title);
    System.out.println("The title is: "+new_novel.getTitle());
    sc.close();

}

}

Tried this useless platform after a while and remembered why I left. Retards here never realized one is not supposed to put solution in discussion.

public class Solution {

public static void main(String[] args) {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
    Scanner scan = new Scanner(System.in);
    MyBook myBook = new MyBook();
    String title = scan.nextLine();
    myBook.setTitle(title);
    System.out.println("The title is: "+myBook.getTitle());
}

}

abstract class Book{ String title; abstract void setTitle(String s); String getTitle(){ return title; } }

class MyBook extends Book{ @Override void setTitle(String s){ super.title = s; } }

abstract class Book { String title;

// Implement the body in the child class
abstract void setTitle(String s);

String getTitle() {
    return title;
}

}

class MyBook extends Book {

void setTitle(String s) {
 super.title = s;
}

}

public class Solution { public static void main(String[] args) {

    Book bookTitle = new MyBook();
    Scanner scan = new Scanner(System.in);

    String title = scan.nextLine();

    bookTitle.setTitle(title);

    System.out.println("The title is: " + 
    bookTitle.getTitle());

        }

}

}

}