-1

我正在使用 Google Guava API 来计算字数。

public static void main(String args[])
    {
        String txt = "Lemurs of Madagascar is a reference work and field guide giving descriptions and biogeographic data for all the known lemur species in Madagascar (ring-tailed lemur pictured). It also provides general information about lemurs and their history and helps travelers identify species they may encounter. The primary contributor is Russell Mittermeier, president of Conservation International. The first edition in 1994 received favorable reviews for its meticulous coverage, numerous high-quality illustrations, and engaging discussion of lemur topics, including conservation, evolution, and the recently extinct subfossil lemurs. The American Journal of Primatology praised the second edition's updates and enhancements. Lemur News appreciated the expanded content of the third edition (2010), but was concerned that it was not as portable as before. The first edition identified 50 lemur species and subspecies, compared to 71 in the second edition and 101 in the third. The taxonomy promoted by these books has been questioned by some researchers who view these growing numbers of lemur species as insufficiently justified inflation of species numbers.";

        Iterable<String> result = Splitter.on(" ").trimResults(CharMatcher.DIGIT)
                   .omitEmptyStrings().split(txt);
        Multiset<String> words = HashMultiset.create(result);

        for(Multiset.Entry<String> entry : words.entrySet())
        {
            String word = entry.getElement();
            int count = words.count(word);
            System.out.printf("%S %d", word, count);
            System.out.println();
        }
    }

输出应该是

Lemurs 3

但是我是这样的：

Lemurs 1
Lemurs 1
Lemurs 1

我究竟做错了什么？

4

2 回答 2

3

使用printf("%S %d", words, count)大写S字母隐藏了“狐猴”一词的不同大小写被单独计算的细节。当我运行该程序时，我看到

  • 一次出现的“狐猴”。期间没有被修剪
  • 一次出现的“狐猴”全部小写
  • 出现第一个字母大写的“狐猴”
于 2014-01-30T17:46:03.800 回答
3

MultiSet工作正常。仔细查看您的结果 - 切换printf到 eg"|%S| %d"将有助于：

|lemurs.| 1
|lemurs| 1
|Lemurs| 1

很明显，这些都是 3 个不同的字符串。在这种情况下，解决方案是简单地去除所有非字母字符，并将所有单词小写。

于 2014-01-30T17:48:11.583 回答