找不到 Java .txt 文件

Question

对于一项作业，我需要调用另一个类 SentenceChecker 中的方法，该类使用 .txt 文件 web2.txt。我已将 Cryptography.java (在其中调用该方法)、Cryptography.class、SentenceChecker.java、SentenceChecker.class 和 web2.txt 文件全部放在同一个文件夹中，并更改了每个人的读写权限，但仍然找不到文件。请告诉我该怎么办？这是代码:

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

public class SentenceChecker {

final static int NUMBER_WORDS = 234936;

public static String[] wordList = initializeList();

public static int countEnglishWords(String input) {
 String[] allWords = input.split(" ");
 int totalWords = 0;
 for (int i=0; i < allWords.length; i++) {
 String transformed = allWords[i].toLowerCase();
 transformed = transformed.replaceAll("[^A-Za-z]", "");
 if (findWord(transformed)) {
  totalWords++;
     }
 }

 return totalWords;
}

private static boolean findWord(String input) {
 int left = 0;
 int right = wordList.length - 1;
 while (left <= right) {
 int center = (left + right ) / 2;
 if (wordList[center].equals(input)) {
  return true;
 }

 if (wordList[center].compareTo(input) < 0) {
  left = center + 1;
 }
 else {
  right = center - 1;
 }
 }

 return false;
}

private static String[] initializeList() {
 try {
 Scanner scanner = new Scanner(new File("web2.txt"));
 String[] words = new String[NUMBER_WORDS];
 int i=0;

 while (scanner.hasNextLine()) {
  words[i] = scanner.nextLine().toLowerCase();
  i++;
 }
 return words;
 }
 catch (FileNotFoundException e) {
 System.out.println("WARNING: The file web2.txt was not found. Is it in the same directory as your other java files?");

 return null;
 }
    }
}

Answer 1

new File("web2.txt") 行是相对于您的当前工作目录的路径，该路径不一定是您的文件所在的位置。

假设 web2.txt 在您的类路径中，您应该尝试如下操作:

URL path = ClassLoader.getSystemResource("web2.txt");
File f = null;
if(path != null) { // file exists
     f = new File(path.toURI());
} else {
   //The file was not found, insert error handling here
}