calc PI slice

gistfile1.java

static double calculatePiFor(int slice, int nrOfIterations) {
    double acc = 0.0;
    for (int i = slice * nrOfIterations; i <= ((slice + 1) * nrOfIterations - 1); i++) {
        acc += 4.0 * (1 - (i % 2) * 2) / (2 * i + 1);
    }
    return acc;
}