Why output is always 0?(JAVA)

Question

I am making a program for finding the volume of a cone by taking radius and height of it as inputs. But the output for volume is always 0 no matter whatever the input for radius and height is.
This is my program
import java.util.*;
class volume
{
public static void main(String args[])
{
Scanner in=new Scanner(System.in);
int r,h;
double v=0.0;
System.out.println("Enter radius and height");
r=in.nextInt();
h=in.nextInt();
v=(1/3)*(22/7)*r*r*h;
System.out.println("Volume of cone="+v);
}
}

Answer 1

Integer/integer will give an integer in java, the decimal will be removed & integer value will be returned.

Answer 2

1/3 uses integer division as both operands are integers (1/3 == 0). Similarly, 22/7 == 3.

Use 1.0/3 and 22.0/7.

Answer 3

Try it like this. I think the divisions are integers in your code.
v=((double)1/3)*((double)22/7)*r*r*h;