public void printStatsSortByCallsCount() throws SQLException {
        TreeSet<TargetStats> tempTree = new TreeSet<TargetStats>();
        for (String key:targetDb.keySet()){
            tempTree.add(targetDb.get(key));
            targetDb.get(key).setSourceNumber(key);
        }

        for (TargetStats tmp:tempTree){
            System.out.println(tmp.getCallsCount() + ": \t" + (User.checkName(tmp.getSourceNumber())));
        }
    }