area of octagon in java

1import java.util.Scanner;
2public class AreaOfOctagon
3{
4   public static void main(String[] args)
5   {
6      Scanner sc = new Scanner(System.in);
7      System.out.println("Please enter length of side of octagon: ");
8      int side = sc.nextInt();
9      float area = (float) (2 * (1 + Math.sqrt(2)) * side * side);
10      System.out.println("Area of octagon is: " + area);
11      sc.close();
12   }
13}