Java - 如何从句子的ArrayList中获取每个单词

Question

示例，如何检查列表 containsThese 中的单词是否存在出现在列表中sentences有多少？

List<String> sentences = Arrays.asList("wish you a good day", "warm day", "sounds good");

List<String> containsThese = Arrays.asList("cool", "day", "good");

我在做什么:

for (int i = 0; i < sentences.size(); i++){

   String words = sentences.get(i);

   // so here I have each sentence separately
   // but how to iterate through it and add each word to another ArrayList or something?
   // so later can compare to it to 'containsThese' ?

}

欢迎大家提出建议，谢谢。

Answer 1

使用下面的函数，您可以在每个空格处拆分句子并将单词添加到新列表中。

private List<String> sentenceToList(String sentence) {
  return new ArrayList<>(Arrays.asList(sentence.split("\\s+")));
}

通过此函数，您将获得一个 Map，其中以句子为键，并包含一个包含来自 containsThese 的所有单词的列表。

private Map<String, List<String>> checkSentences() {
    Map<String, List<String>> containsMap = new HashMap<>();
    sentences.forEach(sentence -> {
        containsMap.put(sentence, sentenceToList(sentence).stream().distinct().filter(word -> containsThese.contains(word)).collect(Collectors.toList()));
    });
    return containsMap;
}

返回-> {温暖的一天=[day]，听起来不错=[good]，祝你有美好的一天=[good, day]}