What are Array of Objects? Hints: Concept, Use Case Syntax and example

Array of Objects is a concept in programming where an array is used to store multiple objects of the same type. It allows us to group related objects together and access them using their index position within the array.

Use Case: Array of Objects is commonly used when we want to store and manipulate a collection of similar objects. For example, if we have a program that manages a list of students, we can use an array of objects to store information about each student, such as their name, age, and grade.

Syntax: To declare an array of objects, we first need to define the object type and then use square brackets to indicate that it is an array. Here is an example syntax:

ObjectType[] arrayName = new ObjectType[arraySize];

Example: Let's say we want to create an array of objects to store information about books. We can define a Book class with attributes like title, author, and publication year. Then, we can declare and initialize an array of Book objects as follows:

class Book {
  String title;
  String author;
  int publicationYear;
}

// Declare and initialize an array of Book objects
Book[] books = new Book[3];

// Create individual Book objects and assign them to array elements
books[0] = new Book();
books[0].title = "The Great Gatsby";
books[0].author = "F. Scott Fitzgerald";
books[0].publicationYear = 1925;

books[1] = new Book();
books[1].title = "To Kill a Mockingbird";
books[1].author = "Harper Lee";
books[1].publicationYear = 1960;

books[2] = new Book();
books[2].title = "1984";
books[2].author = "George Orwell";
books[2].publicationYear = 1949;

In this example, we have created an array of Book objects with a size of 3. We then create individual Book objects and assign them to the array elements by setting their attributes.