boolean isAnagram(String a, String b) {
        if (a.length() != b.length())
            return false;
        int[] c = new int[255];
        for (int i = 0; i < a.length(); i++) {
            c[a.charAt(i)]++;
        }
        for (int i = 0; i < b.length(); i++) {
            c[b.charAt(i)]--;
            if (c[b.charAt(i)] < 0)
                return false;
        }
        return true;
    }
Why Did you create this class? what does it do?
src/problems/medium/ReorderedPowerof2.java