Area, and Circumference of a Circle in Java

 Machine Problem

 Write a program  to ask the user to give the radius of a circle, then the program   will calculate, and display the area and circumference of the circle on the screen using Java programming language.

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Program Listing

// area_circumference_circle.java

// Jake Rodriguez Pomperada,MAED-IT, MIT

// www.jakerpomperada.blogspot.com  and www.jakerpomperada.com

// jakerpomperada@gmail.com

// Bacolod City, Negros Occidental Philippines

/* 

 * Machine Problem

 * 

 * Write a program  to ask the user to give the radius of a circle, then the program

 * will calculate, and display the area and circumference of the circle on the screen.

 * 

 */

import java.util.Scanner;

import java.math.RoundingMode;

import java.text.DecimalFormat;

public class area_circumference_circle {

    

     private static DecimalFormat df2 = new DecimalFormat("#.##");

    public static void main(String[] args) {

        double radius=0.00;

        double area=0.00, circumference=0.00;

        

        Scanner scan = new Scanner(System.in);

        

              

        System.out.println();

        System.out.print("\tArea, and Circumference of a Circle in Java ");

        System.out.println("\n");

                     

        System.out.print("\tGive the Radius of the Circle : ");

        radius = scan.nextDouble();

      

        area = (3.14*radius*radius);

        

        circumference = (2 * 3.14 * radius);

      

        System.out.println("\n");

        System.out.print("\tThe Area of The Circle : " + df2.format(area));

        System.out.println("\n");

        System.out.print("\tThe Circumference of The Circle : " + df2.format(circumference));

        System.out.println("\n");

        System.out.println("\tEnd of Program");

        System.out.println();

   }

}