Java tutorial
import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.List; public class Main { public static void main(String[] args) { List<String> list = new ArrayList<>(); list.add("acowa"); list.add("cow"); list.add("aow"); Collections.sort(list, new Comparator<String>() { @Override public int compare(String o1, String o2) { if (o1.length() > o2.length()) { return 1; } else { return o1.compareTo(o2); } } }); System.out.println(list); } }