debugging PI

I am trying to figure out what is wrong with these code I kind of have the idea of what to do take the value of pi and verify if it is even add it or if is odd sustacted, however I am not sure about if I have to update the sum variable? and If if What I have done so far it is correct.

I am trying to find the value of PI with the following serie Π = 4( 1 – 1/3 + 1/5 – 1/7 + 1/9 – 1/11 + … - 1/(2i -1) + 1/(2i + 1)

assumeing that i = 1000000

Code:

import java.util.Scanner; public class Pi{ public static void main(String[] args) { int sum=0; for (int i=1 ; i< 1000000; i++) { int value = 1/(2 * i-1); if (i%2==0) { sum = sum + value; } else { sum = sum-value; } } }