Method buddyStrings

Java/buddy-strings.java:21–49

(String A, String B)

        return false;
    }
    public boolean buddyStrings(String A, String B) {
        if(A.length() != B.length()){
            return false;
        }
        
        int count = 0;
        char ca = 'A';
        char cb = 'A';
        
        for(int i=0; i<A.length(); i++){
            if(A.charAt(i) != B.charAt(i) ){
                if(count == 0){
                    ca = A.charAt(i);
                    cb = B.charAt(i);
                }
                else if(count == 1){
                    if(ca != B.charAt(i) || cb != A.charAt(i)){
                        count++;
                    }
                }
                count++;
            }
        }
        
        if(count == 2 || (count == 0 && isDuplicate(A))){
            return true;
        }
        return false;
    }
}