Constructors

Now, we will discuss constructors. A constructor is a special method within a class. This method is used when we want to create and initialize an object. In other words, the point at which we create an object is the exact moment we use a constructor, enabling us to execute the code to initialize the object.

In Java, the constructor has the same name as the class, so it is very easy to recognize. Here is an example:

public class Book {
    private String title;
    private String author;
    private String isbn; 
    private int pages;
  
    public Book(String title, String author, String isbn,int pages) {
        this.title = title;
        this.author = author;
        this.isbn = isbn;
        this.pages= pages;
    }
}

We can see that in this Java code, we have a class called Book. This class has four properties: title, author, isbn, and pages. Immediately after these properties, we define something that, in this structure, looks like a method that has...