A Java abstract class is a class that can't be instantiated. That means you cannot create new instances of an abstract class. It works as a base for subclasses. You should learn about Java Inheritance before attempting this challenge.

Question

A Java abstract class is a class that can't be instantiated. That means you cannot create new instances of an abstract class. It works as a base for subclasses. You should learn about Java Inheritance before attempting this challenge.

Following is an example of abstract class:

abstract class Book{
String title;
abstract void setTitle(String s);
String getTitle(){
return title;
}
}
If you try to create an instance of this class like the following line you will get an error:

Book new_novel=new Book();
You have to create another class that extends the abstract class. Then you can create an instance of the new class.

Notice that setTitle method is abstract too and has no body. That means you must implement the body of that method in the child class.

In the editor, we have provided the abstract Book class and a Main class. In the Main class, we created an instance of a class called MyBook. Your task is to write just the MyBook class.

Your class mustn't be public.

Sample Input

A tale of two cities
Sample Output

The title is: A tale of two cities

IN A java code

Answer 1

abstract class Book{

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

class MyBook extends Book {
// Implementing the abstract method of the parent class
void setTitle(String s) {
title = s;
}
}

public class Main {
public static void main(String[] args) {
// Creating an instance of MyBook class
MyBook myBook = new MyBook();

// Setting the title of the book
myBook.setTitle("A tale of two cities");

// Getting and printing the title of the book
System.out.println("The title is: " + myBook.getTitle());
}
}

Answer 2

```

class MyBook extends Book {
// Implementing the abstract method setTitle
void setTitle(String s){
// Setting the title of the book
title = s;
}
}

public class Main {
public static void main(String[] args) {
// Creating an instance of MyBook class
MyBook myBook = new MyBook();

// Setting the title of the book
myBook.setTitle("A tale of two cities");

// Printing the title of the book
System.out.println("The title is: " + myBook.getTitle());
}
}
```

Answer 3

To complete the task of creating the MyBook class in Java, you need to follow these steps:

Step 1: Create a new Java file called MyBook.java.

Step 2: In the MyBook class declaration, extend the abstract class Book using the "extends" keyword. It will look like this:

class MyBook extends Book {

Step 3: Implement the abstract method setTitle(String s) from the Book class. You need to provide a body for this method. Since the method is abstract, you are required to override it in the child class. Add the following code:

@Override
void setTitle(String s) {
title = s;
}

Step 4: Save the MyBook.java file.

Your final MyBook class should look like this:

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

Note: Make sure that the MyBook class is not defined as public, as explicitly mentioned in the task.

Once you have created the MyBook class with the required implementation, you can use it to instantiate an object and set the title. Here's an example:

public static void main(String[] args) {
MyBook myBook = new MyBook();
myBook.setTitle("A tale of two cities");
System.out.println("The title is: " + myBook.getTitle());
}

This code will output:
The title is: A tale of two cities