java - 我需要计算文本文档的总字数、每行平均字数和每行元音

Question

我是 java 的新手，对我正在处理的程序有疑问。该程序的主要思想是给定一个文档，计算文档中的单词总数、每行的平均单词数和每行的元音。我想出了一个起点，但真的不知道如何继续。

import java.io.*;

public class Example {
    public static void main(String[] args) throws IOException {
        int vowelCount = 0, wordsAvg = 0, wordsCount = 0, a;
        char ch;
        String line;
        int vowels1 = 0, vowels2 = 0, vowels3 = 0, vowels4 = 0, vowels5 = 0, vowels6 = 0, vowels7 = 0, vowels8 = 0, vowels9 = 0, vowels10 = 0;
        BufferedReader in ;

        in = new BufferedReader(new FileReader("message.txt"));

        line = in .readLine();
    }
    for (int i = 0; i < line.length(); i++) {
        ch = line.charAt(i);

        if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u') vowels1++;
    }

    {
        System.out.println(line);
        System.out.println("--------------------------------------------");
        System.out.println("Total number of words: " + wordsCount);
        System.out.println("Average number of words per line: " + wordsAvg);
        System.out.println("The number of vowels in line 1 is: " + vowels1);
        System.out.println("The number of vowels in line 2 is: " + vowels2);
        System.out.println("The number of vowels in line 3 is: " + vowels3);
        System.out.println("The number of vowels in line 4 is: " + vowels4);
        System.out.println("The number of vowels in line 5 is: " + vowels5);
        System.out.println("The number of vowels in line 6 is: " + vowels6);
        System.out.println("The number of vowels in line 7 is: " + vowels7);
        System.out.println("The number of vowels in line 8 is: " + vowels8);
        System.out.println("The number of vowels in line 9 is: " + vowels9);
        System.out.println("The number of vowels in line 10 is: " + vowels10);
        line = in .readLine();
    }
}

到目前为止，我已经让程序读取文件并计算第一行的元音，但我真的不知道如何遍历每一行。我还需要显示输出，因为我已经预先设置好了。感谢任何帮助，尽量保持简单会很好。

Answer 1

您可以使用 BufferedReader 在 java 中读取文件，直到 line 不为空。在读取文件时，您可以调用适当的方法来计算单词、元音等的数量 -

BufferedReader br = new BufferedReader(new FileReader("file.txt"));
    try {

        String line = br.readLine();

        while (line != null) {
            int wordsPerLine = countWord(line);
            int vowelsPerLine = countVowel(line);

            line = br.readLine();
        }

    } finally {
        br.close();
    }  

现在您可以像这样编写您的 countWord(String line) 方法 -

//this method will count word for per input line
public int countWords(String line)
{
   String words[]=line.split(" ");
   int count=words.length;
   return count;
}  

你也可以像这样计算每行的元音 -

public int coutnVowels(String line){

   int count =0;
   for(int i=0; i<line.length; i++){

      char currentChar = line.CharAt(i);
      if(currentChar=='a'||currentChar=='e'||currentChar=='i'||currentChar=='o'
      currentChar=='u'){

         count++;
      }
   }

   return count;
}