Java 8 を使用してリスト内の単語の出現頻度を計算する方法

<code class="java">List<String> wordsList = Lists.newArrayList("hello", "bye", "ciao", "bye", "ciao");</code>

<code class="java">{ciao=2, hello=1, bye=2}</code>

<code class="java">Map<String, Long> collect = wordsList.stream()
    .collect(Collectors.groupingBy(Function.identity(), Collectors.counting()));</code>

<code class="java">Map<String, Integer> collect = wordsList.stream()
     .collect(Collectors.groupingBy(Function.identity(), Collectors.summingInt(e -> 1)));</code>

<code class="java">LinkedHashMap<String, Long> countByWordSorted = collect.entrySet()
            .stream()
            .sorted(Map.Entry.comparingByValue(Comparator.reverseOrder()))
            .collect(Collectors.toMap(
                    Map.Entry::getKey,
                    Map.Entry::getValue,
                    (v1, v2) -> {
                        throw new IllegalStateException();
                    },
                    LinkedHashMap::new
            ));</code>