java - 尝试从txt文件中逐行获取字数

Question

我正在尝试创建一个基本类，该类读取我制作的文本文件，并打印出每个特定行上的字数。

我想要的输出是将每个整数打印在新行上。例如，如果第一行有 10 个单词，第二行有 23 个单词，第三行有 24 个单词，我想要:

10

23

24

但由于某种原因，我的代码给了我

190

0

文件中的总字数是多少，何时重置为 0。我做错了什么？

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class numWords {
    public static void main(String[] args) throws FileNotFoundException {
    File file = new File("words.txt");

    Scanner scanner = new Scanner(file);
    int numWords = 0;

    while (scanner.hasNextLine()) {
        while (scanner.hasNext()) {
            numWords++; //counts number of words
            scanner.next(); //goes to the next word if available

        }
        System.out.println(numWords); //prints the number of words
        numWords = 0;  //resets it to 0
        scanner.nextLine(); //goes to the next line

    }
    scanner.close();

}

}

我尝试制作一个 if 语句，表示如果不再有行，那么我将使用scanner.close();。

Answer 1

您的问题是 Scanner.next() 将通过换行符继续。您需要单独获取每一行，然后进行字数统计并输出。

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class numWords {
    public static void main(String[] args) throws FileNotFoundException {
    File file = new File("words.txt");

    Scanner filescanner = new Scanner(file);
    int numWords = 0;

    while (filescanner.hasNextLine()) {
        String line = filescanner.nextLine(); //pulls in next line
        Scanner linescanner = new Scanner(line); //create new scanner for just this line
        while (linescanner.hasNext()) {
            numWords++; //counts number of words
            linescanner.next(); //goes to the next word if available

        }
        System.out.println(numWords); //prints the number of words
        numWords = 0;  //resets it to 0
        linescanner.close();
    }
    filescanner.close();
}