static boolean isAnagram(String a, String b) {

    if (a.length() != b.length()) return false;

    a = a.toLowerCase();
    b = b.toLowerCase();
    String newB = "";

    for (int i=0; i<a.length(); i++) {
        String check = String.valueOf(a.charAt(i));

        if (b.contains(check)) {
            newB += a.charAt(i);
            b = b.replaceFirst(check, "");
        }else {
            return false; 
        }
    }

    return a.contains(newB) && b.isEmpty();
}