public static int squares(int start, int end) {
    int startVal = (int)Math.sqrt(start);
    int endVal = (int)Math.sqrt(end);
    int sqrtcount = 0;
    sqrtcount = (int)IntStream.rangeClosed(startVal, endVal).
    filter(a -> {
        int srt = a*a;
        return srt >= start && srt <=end;
    }).count();
    return sqrtcount;
}