bitwise not ~ operator

[kezkez]

hi, i was just wondering what i'm doing wrong below with the ~ operator ...

public class PiTest
{
public static void main (String[] args)
{
System.out.println(Pi.piR(2));
System.out.println(Pi.piI(2));
System.out.println(Pi.piI(420000));
}
}
class Pi
{

private int n;
public static double piR(int n)
{
if (n < 1)
return 0;

double v = n;

if ( v % 2 == 0)
return piR(n-1) - (4.0 / (2*v-1));
// ~4 / (2*v-1) + piR(n-1) ;
else
return (4 / (2*v-1)) + piR(n-1);

[pbrockway2]

i was just wondering what i'm doing wrong below with the ~ operator ...

Assuming that -n and ~n are equal.

[Aseem]

wherez ur piI method?