Question

我一直在尝试编写一个程序，该程序从文本文件中读取，搜索一个单词，并计算该单词在该文件中的实例数。

这是一个示例输出：

*Enter the name of the text file:
input.dat
Enter the word you're searching for in text file:
that
The word "that" appeared 3 times in the file input.dat*

修改

我的数据文件位于 C：\用户\用户1 \文件\的NetBeansProjects \ WordCounter 它被命名为 superfish 并包含以下词语：

超超新鲜超鱼晚餐烦恼 sooper foosh 超超超

这是我输入输入后得到的输出

*run: Enter the name of the text file: superfish.txt Enter the word you are searching for in the text file: super The word "super" appeared 0 times in the file superfish.txt*

这是我到目前为止编写的代码，主要问题是count在运行时返回0。

我到处寻找解决方案，我无法理解我做错了什么。

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

public class WordCounter 
{
    public static void main(String[] args) throws IOException
    {
       Scanner keyboard = new Scanner(System.in);

       System.out.println("Enter the name of the text file:");
       String name = keyboard.nextLine();
       File file = new File(name);

       System.out.println("Enter the word you are searching for in the text file:");
       String word = keyboard.nextLine();

       try
       {
           System.out.println("The word \""+word+"\" appeared "+ searchCount(file,word) +  " times in the file "+ file); 
       }    
       catch (IOException e) 
       {
            System.out.println(e.getMessage());
       }


    }

    public static int searchCount(File fileA, String fileWord) throws FileNotFoundException
    {
        int count = 0;
        Scanner scanner = new Scanner(fileA);

        while (scanner.hasNextLine())
        {
            String nextWord = scanner.next();
            System.out.println(nextWord);
            if (nextWord.equalsIgnoreCase(fileWord))
            count++;

        }
        //End While 
        return count;
    }   
}

Answer 1

searchCount有两大问题：

实际上并不算数： - ）
检查扫描仪是否有另一行，但只读取一个单词。

以下是searchCount的修订版，修复了这两个问题：

public static int searchCount(File fileA, String fileWord) throws FileNotFoundException
{
    int count = 0;
    fileWord = fileWord.trim();
    Scanner scanner = new Scanner(fileA);

    while (scanner.hasNext()) // Fix issue #2
    {
        String nextWord = scanner.next().trim();
        if (nextWord.equals(fileWord)) { // Fix issue #1
            ++count; 
        }
    }
    //End While 
    return count;
}

搜索和计算文本文件中的特定单词Java

1 个答案: