Folder Locking using Java

Hi,
  Here you can find HOW TO LOCK A FOLDER using java. In this example i passed the images folder as an input to lock. Whenever you passed a file path as an input then the folder which contains the input file is locked. Means no one can be able to modify/delete the file contents. 

import java.io.BufferedReader;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.RandomAccessFile;

import java.nio.channels.FileChannel;

import java.nio.channels.FileLock;

public class FolderLocking {

    public static void main(String[] args) {

        //Pass the Path of the images folder

        String imagePath = "C:\\Users\\Public\\Pictures\\Sample Pictures\\Desert.jpg";

        RandomAccessFile file = null;

        File parentFile = new File(imagePath).getParentFile();

        int length = parentFile.listFiles().length;

        File fileList[] = parentFile.listFiles();

        FileLock fileLocker[] = new FileLock[length];

        for(int i=0; i<fileList.length; i++)

        {

            try {

                file = new RandomAccessFile(fileList[i],"rws");

                FileChannel fileChannel = file.getChannel();

                fileLocker[i] = fileChannel.tryLock();

            } catch (FileNotFoundException e) {

                e.printStackTrace();

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        System.out.println("Enter the Key.......");

        try {

            if(br.readLine().equals("Open"))

            {

                for(int j=0;j<fileLocker.length;j++)

                    {

                        if(fileLocker[j] != null)

                            fileLocker[j].release();

                    }

            }

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

}