• Java allows us to store objects in an array. In Java, the category is additionally a user-defined data type. An array that contains class-type elements is understood as an array of objects.
• It stores the reference variable of the thing.
• This Array is employed to implement on data sets that need performing operations on different data types simultaneously same like structures in c, this Objects array provide us the posh to calculate
• For example, if we would like to write down a program that works with books details typically contain various attributes like book id(integer), name(String), Author name(string),..etc which are of varied data types, so we construct an array Object for Book and write the methods that fetch out various details of this book.

Book[] b = new Book[array_length];

ClassName object[]=new ClassName[array_length];

Way 2

ClassName[] objArray; 

Way 3

ClassName objectArray[];  

Implementation: Array of objects 

Employee_department1[20];  
Employee_department2[20]; 
Employee_department3[20];

Example:

// Java Program to Implement Array Of Objects

// Class 1
// Helper class
// Product class- product Id and product name as attributes
class Product {

	// Member variables
	// Product ID
	int pro_Id;
	// Product name
	String pro_name;

	// Constructor
	Product(int pid, String n)
	{
		pro_Id = pid;
		pro_name = n;
	}

	// Method of this class
	public void display()
	{

		// Print and display the productID and product name
		System.out.print("Product Id = " + pro_Id + " "
						+ " Product Name = " + pro_name);

		System.out.println();
	}
}

// Class 2
// Main class
public class GFG {

	// Main driver method
	public static void main(String args[])
	{

		// Creating an array of product object, or simply
		// creating array of object of class 1
		Product[] obj = nzew Product[5];

		// Creating & initializing actual product objects
		// using constructor
		// Custom input arguments
		obj[0] = new Product(23907, "Hp Omen Gaming 15");
		obj[1] = new Product(91240, "Dell G3 Gaming");
		obj[2] = new Product(29823, "Asus TUF Gaming");
		obj[3] = new Product(11908, "Lenovo Legion Gamig");
		obj[4] = new Product(43590, "Acer Predator Gaming");

		// Lastly displaying the product object data
		System.out.println("Product Object 1:");
		obj[0].display();

		System.out.println("Product Object 2:");
		obj[1].display();

		System.out.println("Product Object 3:");
		obj[2].display();

		System.out.println("Product Object 4:");
		obj[3].display();

		System.out.println("Product Object 5:");
		obj[4].display();
	}
}

Output

Product Object 1:
Product Id = 23907   Product Name = Hp Omen Gaming 15
Product Object 2:
Product Id = 91240   Product Name = Dell G3 Gaming
Product Object 3:
Product Id = 29823   Product Name = Asus TUF Gaming
Product Object 4:
Product Id = 11908   Product Name = Lenovo Legion Gamig
Product Object 5:
Product Id = 43590   Product Name = Acer Predator Gaming