Java Program to Calculate Area of Rectangle

In this post, we will write a java program to calculate the area of the rectangle and perimeter of the Rectangle. We will have two java classes.

Rectangle class
RectangleMain driver class

Eclipse IDE Setup

Some steps and instructions to create a Java application on Eclipse IDE:

Create Java Project in Eclipse

https://www.testingdocs.com/create-a-new-java-project-in-eclipse/

Create Java Package in Eclipse

https://www.testingdocs.com/create-java-package-in-eclipse-ide/

Create Java Class in Eclipse

https://www.testingdocs.com/create-a-new-java-class-in-a-project/

Run Java Project in Eclipse

https://www.testingdocs.com/run-java-project-in-eclipse/

Java Program

Rectangle class

/**************************************************
 * Rectangle.java class
 * @program : 
 * @web : www.TestingDocs.com
 * @author : 
 * @version : 1.0
 **************************************************/

public class Rectangle {
 private double height;
 private double width;

 /**
 * @param height
 * @param width
 */
 public Rectangle(double height, double width) {
 this.height = height;
 this.width = width;
 }

 /**
 * @return the height
 */
 public double getHeight() {
 return height;
 }

 /**
 * @param height the height to set
 */
 public void setHeight(double height) {
 this.height = height;
 }

 /**
 * @return the width
 */
 public double getWidth() {
 return width;
 }

 /**
 * @param width the width to set
 */
 public void setWidth(double width) {
 this.width = width;
 }

 //calculating Area of the rectangle
 public double calculateArea() {
 return width * height;
 }

 //calculating perimeter of the rectangle
 public double calculatePerimeter() {
 return 2*(width + height);
 }
}

RectangleMain

/**************************************************
 * RectangleMain.java
 * @program : Demo program of Rectangle class
 * @web : www.TestingDocs.com
 * @author : 
 * @version : 1.0
 **************************************************/

public class RectangleMain {
 public static void main(String args[]) {
 // Creating Rectangle object
 Rectangle r1 = new Rectangle(5.0,3.5);

 System.out.println("--------------Output----------");
 System.out.println("Height of r1 in centimeter = " + r1.getHeight());
 System.out.println("Width of r1 in centimeter = " + r1.getWidth());
 System.out.println("Area of r1 = " + r1.calculateArea() + " cm ^2");
 System.out.println("Perimeter of r1 = " + r1.calculatePerimeter() + " cm");

 }
}