public class sortingtext {

    public static void main(String[] args) throws IOException {
            String  readline="i have a sentence with words";
            String[] words=readline.split(" ");

            Arrays.sort(words, (a, b)->Integer.compare(b.length(), a.length()));

            for (int i=0;i<words.length;i++)
            {
                int len = words[i].length();

                int t=0;

                System.out.println(len +"-"+words[i]);
            }

        }

final Map<Integer, List<String>> lengthToWords = new TreeMap<>(
    Arrays.stream(words)
        .collect(Collectors.groupingBy(String::length))
);