### 7.7 Arrays of Object

You can create arrays of objects like any other datatype. For example, in section 6.3, we created a Rectangle class to implement the basic properties of a Rectangle. The following code declares an array of five Rectangle objects:

``Rectangle[] rectangles = new Rectangle[5];``

The variable that references the array is named rectangles. Each element in this array is a reference variable. You must create a Rectangle object reference to array element like :

``rectangles[0] = new Rectangle();``

You can use a loop to create objects for each element.

Following program demonstrates this:

``````/**
* This Program creates
* an array of rectangles.
*/
import java.util.*;

public class ArrayOfObjects
{
public static void main(String[] args)
{
// Create an array to hold rectangle's data.
Rectangle[] rectangles = new Rectangle[5];
double length; //to hold length of rectangle
double width;  //to hold width of rectangle

// Create a Scanner object for keyboard input.
Scanner console = new Scanner(System.in);
Rectangle[] rectangles = new Rectangle[5];

for (int i = 0; i < 5; i++)
{
System.out.print("Enter the length of Rectangle " + (i + 1)
+ ": ");
length = console.nextDouble();
System.out.print("Enter the width of Rectangle " + (i + 1)
+ ": ");
width = console.nextDouble();
rectangles[i] = new Rectangle(length, width);
System.out.println();
}

for (int i = 0; i < 5; i++)
{
System.out.println("Area of Rectangle " + (i + 1) + ": "
+ rectangles[i].getArea());
}
}
}``````

Output :

Enter the length of Rectangle 1: 12
Enter the width of Rectangle 1: 3

Enter the length of Rectangle 2: 5
Enter the width of Rectangle 2: 4

Enter the length of Rectangle 3: 1.5
Enter the width of Rectangle 3: 2.2

Enter the length of Rectangle 4: 6
Enter the width of Rectangle 4: 7

Enter the length of Rectangle 5: 8
Enter the width of Rectangle 5: 2

Area of Rectangle 1: 36.0
Area of Rectangle 2: 20.0
Area of Rectangle 3: 3.30
Area of Rectangle 4: 42.0
Area of Rectangle 5: 16.0