Write an object oriented program in Java to find area of circle.

CODE

import java.util.Scanner;

/*

* Java Program to calculate area of circle

*/

public class Circle

{ public static void main(String args[]) {

// creating scanner to accept radius of circle

Scanner scanner = new Scanner(System.in);

System.out.println("Welcome in Java program to calculate area of circle");

System.out.println("Formula for calculating area of circle is 'PI*R^2'");

System.err.println("Please enter radius of circle:");

float radius = scanner.nextFloat();

double area = area(radius);

System.out.println("Area of Circle calculate by Java program is : " + area);

scanner.close();

}

public static double area(float radius) {

double interest = Math.PI * radius * radius;

return interest;

}

}

Output

Welcome in Java program to calculate area of circle

Formula forcalculating area of circle is 'PI*R^2'

Please enter radius of circle:

2

Area of Circle calculate by Java program is : 12.566370614359172