int[] hash = new int[] { 0x9E3779B9, 0x01234567, 0x89ABCDEF, 0x243F6A88, 0xB7E15162 };

        for (int i : intArray) {
            long l = (long) hash[0] * hash[0] + i;
            hash[0] = (int) l;
            hash[1] += l;
            hash[2] += (l >> 32);
            hash[3] ^= l;
            hash[4] ^= (l >> 32);
        }