How to sort List of List in 3 Categories [closed]

Answer 1

public class SortListExample {
    public static void main(String[] args) {
        List a = Arrays.asList("TEAMA", "COUNTRYA", "PLAYERA");
        List b = Arrays.asList("TEAMB", "COUNTRYF", "PLAYERB");
        List c = Arrays.asList("TEAMC", "COUNTRYR", "PLAYERC");
        List d = Arrays.asList("TEAMB", "COUNTRYA", "PLAYERD");
        List e = Arrays.asList("TEAMA", "COUNTRYA", "PLAYERE");
        List f = Arrays.asList("TEAMA", "COUNTRYF", "PLAYERF");
        List> FinalList = new ArrayList<>();
        FinalList.add(a);
        FinalList.add(b);
        FinalList.add(c);
        FinalList.add(d);
        FinalList.add(e);
        FinalList.add(f);
        List> listToSort = new ArrayList<>(FinalList);
        listToSort.sort((l1, l2) -> {
            int i = 0;
            while (true) {
                if (l1.get(i) != null && l2.get(i) != null) {
                    int compareVal = l1.get(i).compareTo(l2.get(i));
                    if (compareVal != 0) {
                        return compareVal;
                    }
                    i++;
                }
            }
        });
        for (List list: listToSort) {
        System.out.println(list);
    }
    }
}