Overview

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");

  }
}

 

Output

————–Output———-
Height of r1 in centimeter = 5.0
Width of r1 in centimeter = 3.5
Area of r1 = 17.5 cm ^2
Perimeter of r1 = 17.0 cm

Screenshot

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Java Tutorial on this website: https://www.testingdocs.com/java-tutorial/

For more information on Java, visit the official website :

https://www.oracle.com/in/java/