**Program to demonstrate how to Calculate Area and Perimeter of Rectangle in Java.**

package com.hubberspot.example; // Import java.util.Scanner to read data from // console import java.util.Scanner; public class RectangleAreaPerimeterDemo { public static void main(String[] args) { // Creating a Scanner object using a constructor // which takes the System.in object. There are various // constructors for Scanner class for different // purposes. We want to use Scanner class to read // data from console on the system, So we are using // a constructor which is taking an System.in object Scanner scanner = new Scanner(System.in); // Create three variables which will hold the // values for length, breadth , area and perimeter of Rectangle. int length = 0; int breadth = 0; int area = 0; int perimeter = 0; // prompt the user to enter value of length of // Rectangle System.out.print("Enter the length of Rectangle : "); // store the length into length variable entered by user length = scanner.nextInt(); // prompt the user to enter value of breadth of // Rectangle System.out.print("Enter the breadth of Rectangle : "); // store the breadth into breadth variable entered by user breadth = scanner.nextInt(); // Calculate area of Rectangle by multiplying length into breadth. area = length * breadth; // Calculate perimeter of Rectangle by 2 * (length + breadth) perimeter = 2 * (length + breadth); // Output area and perimeter to the console System.out.println("Area of Rectangle is : " + area); System.out.println("Perimeter of Rectangle is : " + perimeter); } }

**Output of the program :**