如何将Map转换为包含单词及其频率的类单词

List<Word>

或者我必须创造类似的

Map<String, List<Word>> wordFreq

我避免使用一些简洁的方法

public class Word implements Comparable<Word> {
    private String content;
    private int frequency;
}

class CONTAINER {
 public static void main(String[] args) {
 StringBuilder userWords = new StringBuilder();
userWords.append("some sequence of words");
Map<String, Long> wordFreq = Stream.of(userWords.toString().split(" ")).parallel()
                    .collect(Collectors.groupingBy(String::toString, Collectors.counting()));
            List<Word> words = new ArrayList<>();
            for (Map.Entry<String, Long> a : wordFreq.entrySet()) {
                words.add(new Word(a.getKey(), Math.toIntExact(a.getValue())));
            }
    words.forEach(s -> System.out.println(s.getContent() + " : " + s.getFrequency()));
  }
}