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Learn Object-Oriented Programming in Java

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Explore practical Java programming by analyzing Amazon's Top 50 Bestselling Books dataset. Learn to code functions that count books by authors, list unique authors, retrieve book titles, filter by user ratings, and extract pricing details, enhancing your ability to manipulate and analyze real data using Java.

We'll cover the following...

Task I: Total number of books by an author

Our task is to find the total number of books written by specific authors.

✏️ Note: Below is the same code we saw in the previous lesson to read the dataset as objects of book class. Write the piece of code to answer the questions below.

It takes the name of an author and dataset as input and returns the total number of books written by the author.

Input: J.K. Rowling

Expected output:

Total number of books by J.K. Rowling: 6

Just for reference, Author is the second column in the dataset.

Java
import java.util.ArrayList;
public class driver {
    // Write your code here
    }
}

If you’re unsure how to do this, click the “Show Hint” button.

Task II: All the authors in the dataset

Our task is to find the names of all the authors present in the dataset. Remember: many records may have the same author, so don’t consider the same author multiple times.

Expected output: List name of all authors in the dataset.

Just for reference, Author is the second column in the dataset.

Java
public class Book {
    private String title;
    private String author;
    private String userRating;
    private String reviews;
    private String price;
    private String year;
    private String genre;
    // Constructor
    public Book(String title, String author, String userRating, String reviews, String price, String year, String genre) {
        this.title = title;
        this.author = author;
        this.userRating = userRating;
        this.reviews = reviews;
        this.price = price;
        this.year = year;
        this.genre = genre;
    }
    // Getters
    public String getTitle() {
        return title;
    }
    public String getAuthor() {
        return author;
    }
    public String getUserRating() {
        return userRating;
    }
    public String getReviews() {
        return reviews;
    }
    public String getPrice() {
        return price;
    }
    public String getYear() {
        return year;
    }
    public String getGenre() {
        return genre;
    }
    // Setters
    public void setTitle(String title) {
        this.title = title;
    }
    public void setAuthor(String author) {
        this.author = author;
    }
    public void setUserRating(String userRating) {
        this.userRating = userRating;
    }
    public void setReviews(String reviews) {
        this.reviews = reviews;
    }
    public void setPrice(String price) {
        this.price = price;
    }
    public void setYear(String year) {
        this.year = year;
    }
    public void setGenre(String genre) {
        this.genre = genre;
    }
}
...