java program to calculate area of a circle

1import java.util.Scanner;
2public class CalculateAreaOfCircle
3{
4   public static void main(String[] args)
5   {
6      double radius;
7      double pi = 3.1415, area;
8      Scanner sc = new Scanner(System.in);
9      System.out.println("Please enter radius of circle: ");
10      radius = sc.nextDouble();
11      area = pi * radius * radius;
12      System.out.println("Area of circle: " + area);
13      sc.close();
14   }
15}

1import java.util.Scanner;
2public class AreaOfCircle {
3   public static void main(String args[]){
4      int radius;
5      double area;
6      Scanner sc = new Scanner(System.in);
7      System.out.println("Enter the radius of the circle ::");
8      radius = sc.nextInt();
9      area = (radius*radius)*Math.PI;
10      System.out.println("Area of the circle is ::"+area);
11   }
12}