How to get List comparator using Comparator class.

reference : java generic 

public static <E> Comparator<List<E>> listComparator(final Comparator<E> comp) {

return new Comparator<List<E>>() {

public int compare(List<E> list1, List<E> list2) {

int n1 = list1.size();

int n2 = list2.size();

for (int i = 0 ; i < Math.min(n1, n2) ; i++) {

int k = comp.compare(list1.get(i), list2.get(i));

if (k != 0) {

return k;

}

}

return (n1 < n2) ? -1 : (n1 == n2) ? 0 : 1;

}

};

}