java - 在 Java 中转换 ArrayList

Question

我有以下代码，用于计算并显示每个单词在整个文本文档中出现的次数。

try {
    List<String> list = new ArrayList<String>();
    int totalWords = 0;
    int uniqueWords = 0;
    File fr = new File("filename.txt");
    Scanner sc = new Scanner(fr);
    while (sc.hasNext()) {
        String words = sc.next();
        String[] space = words.split(" ");
        for (int i = 0; i < space.length; i++) {
            list.add(space[i]);
        }
        totalWords++;
    }
    System.out.println("Words with their frequency..");
    Set<String> uniqueSet = new HashSet<String>(list);
    for (String word : uniqueSet) {
        System.out.println(word + ": " + Collections.frequency(list,word));
    }
} catch (Exception e) {

    System.out.println("File not found");

}

是否可以修改此代码，使其只对每行而不是整个文档中的每个出现次数进行计数？

Answer 1

可以读取每行的内容，然后应用每行的逻辑来计算单词数:

   File fr = new File("filename.txt");
   FileReader fileReader = new FileReader(file);
   BufferedReader br = new BufferedReader(fileReader);

       // Read the line in the file 
       String line = null;
        while ((line = br.readLine()) != null) {
              //Code to count the occurrences of the words

        }