java - 当我阅读这个文件时，有人可以帮我在我的代码中添加一个行计数器吗

Question

我不确定如何添加行计数器，因为如果我做一个 while 语句，例如

while (fileReader.hasNextLine()) {
    lines+=1;
    file.nextLine();
}

然后我的其余元音、句子等设置为 0。

我的代码是：

Scanner input = new Scanner(System. in );
System.out.println("Enter file name: ");

File file = new File(input.nextLine());

if (file.length() == 0) {
    System.out.println("The input file is empty.");
    System.exit(1);
}

Scanner fileReader = new Scanner(file);

while (fileReader.hasNext()) {
    String word = fileReader.next();

    for (int i = 0; i < word.length(); i++) {
        char ch = word.charAt(i);
        if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u') vowels += 1;
        if ((ch == '!' || ch == '.' || ch == '?')) sentences += 1;
        if (Character.isLetterOrDigit(ch)) alphaNumeric += 1;
        switch (ch) {
            case ',':
                punctuation += 1;
                break;
            case '[':
                punctuation += 1;
                break;
            case ']':
                punctuation += 1;
                break;
            case ':':
                punctuation += 1;
                break;
            case '`':
                punctuation += 1;
                break;
            case '-':
                punctuation += 1;
                break;
            case '!':
                punctuation += 1;
                break;
            case '_':
                punctuation += 1;
                break;
            case '(':
                punctuation += 1;
                break;
            case ')':
                punctuation += 1;
                break;
            case '.':
                punctuation += 1;
                break;
            case '?':
                punctuation += 1;
                break;
            case '"':
                punctuation += 1;
                break;
            case ';':
                punctuation += 1;
                break;

        }
    }
    words += 1;

}
System.out.println("The number of words in the file name: " + words);
System.out.println("The number of lines in the file name: " + lines);
System.out.println("The number of alphanumeric characters " + "in the file name: " + alphaNumeric);
System.out.println("The number of sentences in the file name: " + sentences);
System.out.println("The number of vowels in the file name: " + vowels);
System.out.println("The number of punctuations in the file name: " + punctuation);

Answer 1

换行符由字符 '\n' 表示。您可以检查这种情况，就像检查元音、标点符号等一样。

Answer 2

使用这组线

   String line = fileReader.nextLine();

   for (int i = 0; i < line.length(); i++) {
                 char ch = line.charAt(i);
                 if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u') vowels += 1;
                 if ((ch == '!' || ch == '.' || ch == '?')) sentences += 1;
                 if (Character.isLetterOrDigit(ch)) alphaNumeric += 1;
                 switch (ch) {
                    // do something

                 }
             }
             lines ++;
             words += line.split(" ").length;

在您的原始代码中，这些单词只不过是行。它们不是这样的词。