boolean isAnagram(String a, String b) {

    char [] a1 = a.toLowerCase().toCharArray();
    char [] a2 = b.toLowerCase().toCharArray();
    if (a1.length==a2.length){
        for (int i=0;i<a1.length;i++){
            if ((b.toLowerCase()).contains(a1[i]+"")){
            int ind = b.toLowerCase().indexOf(a1[i]);
            int count1 = 0;
            int count2 = 0;
            for (int j=0;j<a2.length;j++){
                if (a1[i]==a1[j]){
                    count1++;
                }
                if (a2[ind]==a2[j]){
                    count2++;
                }
            }
            if (count1!=count2){
                return false;
            }
            }
            else{
                return false;
            }
        }
        return true;
    }
    else{
        return false;
    }
}