Question

请帮我弄清楚当我针对特定文件夹进行搜索时如何计算结果？

另外，如何询问用户是否要进行其他搜索？

// Importing utilities
import java.io.File;
import java.util.*;

public class FileListing
{    
    public static void main (String[] args)
    {
        // Creating a Scanner
        Scanner keyboard = new Scanner(System.in);

        // Specifying search location
        File file = new File("D:/Music");

        String[] content = file.list();

        // Searching for a match
        System.out.println("Enter the first few characters of the folder/file to do a lookup");
        String userInput = keyboard.nextLine(); 

        // Adding text to say what the user searched for
        System.out.println("Below you will find the list of folders/files with a partial match to (" + userInput + ").");
        System.out.println();

        // Posting the contents
        for(String folders : content)
        {
            if(folders.toUpperCase().startsWith(userInput.toUpperCase()))
            {
                System.out.println("Name: " + folders);
            }
        }
    }   
}

Answer 1

我会添加一个变量

public function notfoundAction()
{
    throw new Zend_Controller_Action_Exception('This page does not exist', 404);
}

在for循环之前，如果它匹配则只增加它。

Answer 2

这应该让你开始。每次找到匹配项时，我都会递增变量count。我也在永远循环，所以它不断要求用户提供更多的输入。

// Importing utilities
import java.io.File;
import java.util.*;
public class FileListing
{    
    public static void main (String[] args)
    {
        // Creating a Scanner
        Scanner keyboard = new Scanner(System.in);

        // Specifying search location
        File file = new File("D:/Music");

        String[] content = file.list();

        while(true){

            // Searching for a match
            System.out.println("Enter the first few characters of the folder/file to do a lookup");
            String userInput = keyboard.nextLine(); 

            // Adding text to say what the user searched for
            System.out.println("Below you will find the list of folders/files with a partial match to (" + userInput + ").");
            System.out.println();

            // Posting the contents
            int count=0;
            for(String folders : content)
            {
                if(folders.toUpperCase().startsWith(userInput.toUpperCase()))
                {
                    System.out.println("Name: " + folders);
                    count++;
                }
            }
        }
    }   
}

Answer 3

如果您想计算比赛数，可以执行以下操作

  int i=0;
    // Posting the contents
    for(String folders : content)
    {
        if(folders.toUpperCase().startsWith(userInput.toUpperCase()))
        {
            System.out.println("Name: " + folders);
            i++;
        }
    }
    System.out.println("Total number of results: " + i);`

至于询问用户，请考虑使用以下格式的do-while循环

do{
// your code
// ask user and read his answer on a string called userChoice
}while (userChoice.equals('y'))

尝试我们的建议，你会很容易找到答案！

Answer 4

使用while循环并提示用户输入短语（例如＆＃39;退出＆＃39;），如果他们想要停止。读取用户输入后，检查短语并在符合退出短语的情况下调用中断。

使用罗伯特建议的变量来计算找到的文件总数。

如何返回搜索后找到的项目数？

4 个答案: