Java Program to calculate the area and perimeter of a rectangle :
In this tutorial, we will learn how to find the area and perimeter of a rectangle. To find the area and perimeter, we need only height and width of the rectangle. Area of a rectangle is_ ‘height * width’_ and perimeter is ’ 2* ( height + width )’ .
Let’s take a look into the program :
Java program :
import java.util.Scanner;
public class Main {
//8
/**
* Utility function for System.out.println
*
* @param message : string to print
*/
private static void println(String message) {
System.out.println(message);
}
/**
* Utility function for System.out.print
*
* @param message : string to print
*/
private static void print(String message) {
System.out.print(message);
}
/**
* main method
*
* @throws java.lang.Exception
*/
public static void main(String[] args) throws java.lang.Exception {
//1
double height, width, area, perimeter;
//2
Scanner scanner = new Scanner(System.in);
//3
print("Enter the height of the rectangle : ");
height = scanner.nextFloat();
print("Enter the width of the rectangle : ");
width = scanner.nextFloat();
//4
area = height * width;
perimeter = 2 * (height + width);
//5
println("Area = " + area);
println("Perimeter = " + perimeter);
}
}
Sample Output :
Enter the height of the rectangle : 10
Enter the width of the rectangle : 10
Area = 100.0
Perimeter = 40.0
Enter the height of the rectangle : 9
Enter the width of the rectangle : 15
Area = 135.0
Perimeter = 48.0
Explanation :
-
Create variables to store height, width, area and perimeter of the rectangle.
-
Create one ’Scanner’ object to scan the values.
-
Read the height and width of the rectangle.
-
Find the area and perimeter and save the values in variables ’area’ and ’perimeter‘.
-
Print out ’Area’ and ’Perimeter’