BufferedReader在这里用于读取文件中的每一行，并将每一行添加到一个Strings的ArrayList中。

public static void main(String[] args) {
    ArrayList<String> words = new ArrayList<String>();
    try {
        BufferedReader reader = new BufferedReader(new FileReader("dictionary.txt"));
        String line = reader.readLine();
        while (line != null) {
            words.add(line);
            line = reader.readLine();
        }
        reader.close();
    } catch (Exception e) {
        System.err.println("Error reading file: " + e.getMessage());
        System.exit(1);
    }
    String[] wordsArray = words.toArray(new String[0]);
    System.out.println("Number of words in dictionary: " + wordsArray.length);
}

如果这对将来的任何人都有用的话，这就是我在评论中实现解决方案的方法（我没有一直使用数组列表，因为我几乎不知道如何使用它们，而且现在开始学习的截止日期已经越来越近了）：

public static void main(String[] args) throws IOException {
        NumberFormat formatter = NumberFormat.getNumberInstance(Locale.US); // formats the amount of nanoseconds displayed

        List<String> words = Files.readAllLines(Paths.get("dictionary.txt"), StandardCharsets.UTF_8); // reads txt file and stores it in an array list
  
        String[] transformed = words.toArray(new String[words.size()]); // transforms array list into a String array...
        String[] wordsToSort = transformed.clone(); // makes a copy to safely change it in the future...
  
        // Testing Sorting algorithms......

List<String> words = Files.readAllLines(Paths.get("dictionary.txt"), StandardCharsets.UTF_8);这一行一次将超过600000个元素存储到一个数组列表中，这样就不需要一个循环来一一存储它们。