Java 如何返回搜索后找到的项目数？

请帮助我了解在搜索特定文件夹时如何获得结果计数

另外，我如何询问用户是否要执行另一次搜索

// 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);
            }
        }
    }   
}

我将添加一个变量

int count = 0;

---

就在for循环之前，如果匹配，只需增加它。

这应该可以让您开始。每次找到匹配项时，我都会增加变量

count

。我也会一直循环，所以它会不断要求用户输入更多内容

// 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++;
                }
            }
        }
    }   
}

---

如果要计算匹配项，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'))

---

尝试一下我们的建议，你会很容易找到答案

如果用户想要停止，使用while循环并提示用户输入短语（如“退出”）。阅读用户输入后，检查短语，如果与退出短语匹配，则调用break

---

按照Robert的建议使用一个变量来计算找到的文件总数。

反勾号用于内联代码，如

this

。。。要生成代码块，请将代码缩进4个空格。或者选择它并点击顶部的{}图标。谢谢你，我能够实现我想要的。谢谢你。