如何在Java中获得文本文件的单词列表和单词数？

Question

我是新来的，我想要得到一个文本文件的单词列表和单词数。这是我尝试过的代码：

public class Main {

    public static void main(String args[]) throws Exception {
        // write your code here
        String line;


        FileReader fr = new FileReader("Wordlist (1).txt");
        BufferedReader br = new BufferedReader(fr);

        int i;
        while ((i = br.read()) != -1) {
            System.out.print((char) i);
        }

        int count = 0;

        if ((line = br.readLine()) == null) {
            System.out.println("Error");
        } else {
            //Splits each line into words
            String words[] = line.split("\\s+");
            //Counts each word
            count = count + words.length;

        }
        //Gets each line till end of file is reached
        /*while ((line = br.readLine()) != null) {
            //Splits each line into words
            String words[] = line.split("\\s+");
            //Counts each word
            count = count + words.length;

        }*/

        System.out.println("Number of words in the file: " + count);
        br.close();
        fr.close();
    }
}

输出：century Cepheus CEQ陶瓷Cerberus谷类小脑错误文件字数：0

Answer 1

删除这些代码：

int i;
while ((i = br.read()) != -1) {
    System.out.print((char) i);
}

因为在br.read()完成后，指针将指向文件内容的末尾。因此，如果您随后按如下方式调用br.readline()，它通常会返回-1，这意味着您已经完成了对整个文件的读取。

所以您必须删除上面的代码，然后使用下面的代码：

int count = 0;
while ((line = br.readLine()) != null) {
    //Splits each line into words
    String words[] = line.split("\\s+");
    //Counts each word
    count = count + words.length;
}