RETRIEVING LIST OF FILES NAME WITH EXTENSION IN SPECIFIED FOLDER:

RETRIEVING LIST OF FILES NAME WITH EXTENSION IN SPECIFIED FOLDER:

import java.io.File;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import java.util.Scanner;

public class FileHandler 

{

    public static void main(String[] args) throws IOException

    {

        List<String> files=new ArrayList<>();

        String folderPath="D:\\DOWNLOADS\\";

File folder = new File(folderPath);

if (folder.isDirectory()) {

File[] listOfFiles = folder.listFiles();

if (listOfFiles.length < 1)

System.out.println("There is no File inside Folder");

else

System.out.println("List of Files & Folder");

 for (File file : listOfFiles) {

                               if(!file.isDirectory())

                               {

                     files.add(file.getCanonicalPath().toString());

                               }

                              

                             

}

 System.out.println(files);

 filesearch(files);

}

else

System.out.println("There is no Folder @ given path :" + folderPath);

byte[] data = new byte[20];

                System.in.read(data);

}

    public static void filesearch(List<String> files)

    {

        for(int i=0;i<files.size();i++)

        {

            System.out.println("FILE NAME..:"+files.get(i));

        File file =new File(files.get(i));

    Scanner in = null;

        try {

            in = new Scanner(file);

            while(in.hasNext())

            {

                String line=in.nextLine().trim();

               if(line.contains("hello"))

                    System.out.println(line);

            }

        }

catch (FileNotFoundException e) {

            e.printStackTrace();

        }

        }

       

    }

   

   

}

OUTPUT:

D:DOWNLODS/

List of Files & Folder

[D:\DOWNLOADS\09c-DataStructuresListsArrays.ppt, D:\DOWNLOADS\BLUETOOTH CODING.docx, D:\DOWNLOADS\Chrysanthemum.jpg, D:\DOWNLOADS\client_server_krm_01may2002.ppt, D:\DOWNLOADS\data.pdf, D:\DOWNLOADS\DataBase.docx, D:\DOWNLOADS\Dclient_server_krm_01may2002.ppt, D:\DOWNLOADS\des.docx, D:\DOWNLOADS\Desert.jpg, D:\DOWNLOADS\Granizo.pdf, D:\DOWNLOADS\style.css, D:\DOWNLOADS\Thumbs.db, D:\DOWNLOADS\~$taBase.docx]

FILE NAME..:D:\DOWNLOADS\09c-DataStructuresListsArrays.ppt

FILE NAME..:D:\DOWNLOADS\BLUETOOTH CODING.docx

FILE NAME..:D:\DOWNLOADS\Chrysanthemum.jpg

FILE NAME..:D:\DOWNLOADS\client_server_krm_01may2002.ppt

FILE NAME..:D:\DOWNLOADS\data.pdf

FILE NAME..:D:\DOWNLOADS\DataBase.docx

FILE NAME..:D:\DOWNLOADS\Dclient_server_krm_01may2002.ppt

FILE NAME..:D:\DOWNLOADS\des.docx

FILE NAME..:D:\DOWNLOADS\Desert.jpg

FILE NAME..:D:\DOWNLOADS\Granizo.pdf

FILE NAME..:D:\DOWNLOADS\style.css

FILE NAME..:D:\DOWNLOADS\Thumbs.db

FILE NAME..:D:\DOWNLOADS\~$taBase.docx