CODEWITHSUNDEEP
java
user1298788
user1298788

Reputation:

Check any files exist, in a given folder

I've updated my code to handle the listed scenario 1. Check for empty directory 2. Check if the file exist

What other things I should be looking out for when I'm trying to do a filewatch program?

I want to be able to create something that can cover all the possible scenario that could happen when monitoring the file such that when i deploy the code, I can quickly read the output and know what happened

package filemon;

import java.io.File;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;

/**
 * @author LAI XUEYANG
 * @version $Revision: 1.0 $
 */
public class filemon {

    /**
     * Method main.
     * 
     * @param args
     *            String[]
     */
    public static void main(String[] args) {

        // Declare yesterday date with format as yyyyMMdd
        DateFormat dateFormat = new SimpleDateFormat("yyyyMMdd");
        // Calendar yesterdayCal = Calendar.getInstance();

        // Declare today date with format as yyyyMMdd
        Calendar todayCal = Calendar.getInstance();
        String todayDate = dateFormat.format(todayCal.getTime());

        // Declaration of folder path
        File file = new File("D:\\TEST");

        // Declaration of file path
        Path filePath = Paths.get(file + "\\INCIF" + todayDate + ".txt");

        // yesterdayCal.add(Calendar.DATE, -1);
        // String yesterdayDate = dateFormat.format(yesterdayCal.getTime());

        try {
            checkEmptyDirectory(file, filePath);
        } catch (Exception e) {
            System.out.println(e);
        }
        // checkFileExist();
    }

    /**
     * Method checkFileExist.
     * 
     * @param filePath
     *            Path
     */
    private static void checkFileExist(Path filePath) {
        if (Files.exists(filePath)) {
            System.out.println("Filename: " + filePath.toString());
            System.out.println("Exist in location!");
        } else {
            System.out.println("Filename: " + filePath.toString());
            System.out.println("Does not exist in location!");
        }
    }

    /**
     * Method checkEmptyDirectory.
     * 
     * @param file
     *            File
     * @param filePath
     *            Path
     */
    private static void checkEmptyDirectory(File file, Path filePath) {
        if (file.isDirectory()) {
            if (file.list().length > 0) {
                checkFileExist(filePath);
            } else {
                System.out
                        .println("Directory specified does not contain any files!");
            }
        } else {
            System.out.println("Directory specified does not exist!");
        }
    }
}

Upvotes: 4

Views: 11994

Answers (7)

Rahul Kulhari
Rahul Kulhari

Reputation: 1165

i think this might will help you for check that in folder there is a file exist or not!

    File folder = new File("/home/rahul/Documents/r/212/");
    f.listFilesForFolder(folder);

    }
public void listFilesForFolder(final File folder) {
    for (final File fileEntry : folder.listFiles()) {
        if (fileEntry.isDirectory()) {
            listFilesForFolder(fileEntry);
        } else {

            l.add(fileEntry.getName());
        }
    }

My code is getting name of all files available from directory if file exist in folder.

Upvotes: 0

Charaf JRA
Charaf JRA

Reputation: 8334

Using java.io.File

File f = new File(filePathString);
if(f.exists()) { /* do something */ }

In your code : 

File f = new File(filePath);
if(f.exists()) { 
    if(f.isDirectory()){ System.out.println("it's a folder"); }
    System.out.println("File location: " +filePath.toString());
    System.out.println("File exist in location!");
    System.exit(0);

}

Upvotes: 1

user2783621
user2783621

Reputation: 11

import java.io.*;
File file = new File(Path);
if(file.exists()){.........}

Upvotes: 1

njzk2
njzk2

Reputation: 39386

Here 

"C:\\TEST" +todayDate +".txt"

You missed a folder separator. It should probably be:

"C:\\TEST\\" +todayDate +".txt"

Upvotes: 0

awsome
awsome

Reputation: 2153

This should do it http://www.mkyong.com/java/how-to-check-if-directory-is-empty-in-java/

public static void main(String[] args)
{   

File file = new File("\myFolder");

if(file.isDirectory()){

    if(file.list().length>0){

        System.out.println("Directory is not empty!");

    }else{

        System.out.println("Directory is empty!");

    }

}else{

    System.out.println("This is not a directory");

}
}

Upvotes: 0

karthick
karthick

Reputation: 12176

Inorder to find any files in a folder try to do like this

File f= new File(filePathString);
File[] listOfFiles = f.listFiles(); 

if(listOfFiles.length > 0){
//
}else{
//
}

Upvotes: 7

rocketboy
rocketboy

Reputation: 9741

Count the listed files using File#list():

File f = new File(filePathString);
int nOF = f.list().length; //add null check before

Returns an array of strings naming the files and directories in the directory denoted by this abstract pathname. If this abstract pathname does not denote a directory, then this method returns null. Otherwise an array of strings is returned, one for each file or directory in the directory. Names denoting the directory itself and the directory's parent directory are not included in the result. Each string is a file name rather than a complete path.

Upvotes: 0

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