Object creation in Java - Mini Project: Build & Apply

Object creation

📖 Scenario: You are creating a simple program to manage a book in a library. Each book has a title and an author.

🎯 Goal: Build a Java program that creates a Book object with a title and author, then prints the book details.

📋 What You'll Learn

Create a class named Book with two fields: title and author

Create a Book object with the exact title "The Alchemist" and author "Paulo Coelho"

Print the book details in the format: Title: The Alchemist, Author: Paulo Coelho

💡 Why This Matters

🌍 Real World

Creating objects is the foundation of Java programming. It helps model real things like books, cars, or people in software.

💼 Career

Understanding object creation is essential for any Java developer job, as it is the basis for building applications and managing data.

1

Create the Book class with fields

Create a class called Book with two public string fields: title and author.

Java

// Your code here
// Define the Book class with title and author fields

Need a hint?

Use public String title; and public String author; inside the class.

2

Create a Book object with given title and author

Create a Book object named myBook. Set its title to "The Alchemist" and author to "Paulo Coelho".

Java

public class Book {
    public String title;
    public String author;
}

// Your code here
// Create myBook and set title and author

Need a hint?

Create the object with new Book() and assign values to myBook.title and myBook.author.

3

Add code to print the book details

Inside the main method, add a System.out.println statement to print the book details in this exact format: Title: The Alchemist, Author: Paulo Coelho using myBook.title and myBook.author.

Java

public class Book {
    public String title;
    public String author;
}

public class Main {
    public static void main(String[] args) {
        Book myBook = new Book();
        myBook.title = "The Alchemist";
        myBook.author = "Paulo Coelho";
        // Your code here
        // Print book details
    }
}

Need a hint?

Use System.out.println with string concatenation to show the title and author.

4

Run the program to display the book details

Run the program and ensure it prints exactly: Title: The Alchemist, Author: Paulo Coelho

Java

public class Book {
    public String title;
    public String author;
}

public class Main {
    public static void main(String[] args) {
        Book myBook = new Book();
        myBook.title = "The Alchemist";
        myBook.author = "Paulo Coelho";
        System.out.println("Title: " + myBook.title + ", Author: " + myBook.author);
    }
}

// Run the program to see the output

Need a hint?

Make sure your print statement matches the exact output format.