Question

Write the Java code for the calculareDiameter method.

Answer 1

* Program to find diameter, circumference and area of circle.

*/

import java.util.Scanner;

public class Circle {

public static void main(String[] args) {

// Declare constant for PI

final double PI = 3.141592653;

Scanner in = new Scanner(System.in);

/* Input radius of circle from user. */

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

int r = in.nextInt();

/* Calculate diameter, circumference and area. */

int d = 2 * r;

double circumference = 2 * PI * r;

double area = PI * r * r;

/* Print diameter, circumference and area of circle. */

System.out.println("Diameter of circle is : " + d);

System.out.println("Circumference of circle is : " + circumference);

System.out.println("Area of circle is : " + area);

}

}