Java program to find area of a circle

import java.util.Scanner;

public class area {

public static void main(String[] args) {

Scanner sc=new Scanner(System.in);
long r;
double area;
System.out.println("Enter the radius");
r=sc.nextLong();
area =3.14*r*r;
System.out.println("Area of circle is:"+area);
}

}