Write a Java program to display given extension files from a specific directory on server machine.

 DOWNLOAD     SLIP14Q2

/**
 * STEPS TO RUN CODE 
 * Step 01 compile the code
 * Step 02 run the code
 * Step 03 give a file directory location to find file
 * Step 04 give a file extension name without (.)
 * and then u will get all file names
 */

import java.io.*;

/**
 * Created by : Amar Ghugare
 * created on : 21-05-2022 20:44
 * Purpose of class : Write a Java program to display
 * given extension files from a specific directory on
 * server machine.
 */
public class Slip14Q2 {
    public static void main(String[] args) throws IOException {
        String userFileExtension = "";

        BufferedReader bufferedInputStream = new BufferedReader(
                new InputStreamReader(System.in));
        System.out.println("GIVE A FILE LOCATION TO FIND SPECIFIC TYPE OF FILE");
        String userFileLocation = bufferedInputStream.readLine();
        File fileLocation = new File(userFileLocation);
        if (fileLocation.exists()) {
            System.out.println("\nGIVE A FILE EXTENSION TO FIND IN GIVEN DIRECTORY");
            userFileExtension = bufferedInputStream.readLine();
            String finalUserFileExtension = userFileExtension;

            String[] filenamesInDIR = fileLocation.list(new FilenameFilter() {
                @Override
                public boolean accept(File dir, String name) {
                    if (name.toLowerCase().endsWith("." + finalUserFileExtension)) {
                        return true;
                    } else {
                        return false;
                    }
                }
            });
            assert filenamesInDIR != null;
            if(filenamesInDIR.length!=0){
                for (String fileName:filenamesInDIR){
                    System.out.println(fileName);
                }
            }else {
                System.out.println("THERE IS NO FILE OF THAT EXTENSION");
            }
        }else {
            System.out.println("THIS FILE NOT EXIST IF YOU WANT TO RECHECK THEN TYPE 'Y' OR 'N'.");
            String recheckOption = bufferedInputStream.readLine();
            if("Y".equals(recheckOption.toUpperCase())){
                main(args);
            }
        }
    }
}