java - 返回字符数而不是单词数中的单词数

Question

该程序的目的是告诉我一个文件中有多少个单词，但它给了我非常高的数字。暗示它正在读取字符数而不是单词数，或者是一个单独的逻辑错误。

package wordinspection;

import java.io.*;
import java.util.*;

public class WordInspection {
private Scanner reader;
private File file;

public WordInspection(File file) {
    this.file = file;
}

public int wordCount() {
  String words = readFile();
    System.out.println(words);
    words.split("\\s+");
  return words.length();
}

public String readFile() {
    try {
        String str = "";

        Scanner reader = new Scanner(file, "UTf-8");

        while (reader.hasNextLine()) {
            str += reader.nextLine();
            str += "\n";
        }

        return str;
    } catch (FileNotFoundException e) {

        System.out.println("Does nothing");
        return "";

    }

}

Answer 1

words.split("\\s+"); 不会修改 words;它只是返回一个新数组。您忽略返回值并对原始字符串调用 length() 。将其更改为:

return words.split("\\s+").length;