reading files in a directory...

> Hi techies,,

> I am trying to read all the text files in a

> particular directory.I tried using the File class.

> but it didnt help..

>

> Can anyone provide any help....

Sure.

Post the code that "didnt help" and I (or someone else) can probably see why it "didnt help".

When posting code, please use code tags:

http://forum.java.sun.com/help.jspa?sec=formatting

Also post compiler/runtime errors exactly as they are printed.

Thanks.

prometheuzza at 2007-7-12 9:49:31 >

> i want to read all the files in a directory..

> i exactly dont know how to go about it...

> i am using this way..

> ...

No. First read specific files from a directory, then process those files.

Here's how you read .txt files from a specific directory:

import java.io.File;

import java.util.ArrayList;

import java.util.List;

public class Main {

private static List<File> readDirectory(File directory, String extension) {

List<File> found = new ArrayList<File>();

if(!directory.isDirectory()) {

throw new IllegalArgumentException("Invalid directory: "+directory);

}

File[] contents = directory.listFiles();

for(File file : contents) {

if(file.getName().endsWith(extension)) {

found.add(file);

}

}

return found;

}

public static void main(String[] args) {

// Get all txt files from C:\Temp

List<File> files = readDirectory(new File("C:\\Temp"), ".txt");

System.out.println("Found: "+files);

// your code here to process the files

}

}

prometheuzza at 2007-7-12 9:49:31 >

An alternative that I use is the FilenameFilter class:

import java.io.File;

import java.io.FilenameFilter;

public class Main {

public static class TXTFilenameFilter implements FilenameFilter {

public boolean accept( File file, String name ) {

return name.endsWith( "txt" );

}

}

public static void main( String[] args ) {

File file = new File( "c:\\somedir\\" );

String[] list = file.list( new TXTFilenameFilter() );

}

}

remcolliera at 2007-7-12 9:49:31 >

> i am trying it myself...

> just wanted to know some alternatives...

> thanks for your help once again..

>

> i greatly appreciate your help..

> Many Thanks.

> Nadir Firfire

No problem, you're most welcome.

You can always post follow-up question here if you get stuck. Be sure to post the code you're working on and explain exactly what it is you don't understand.

prometheuzza at 2007-7-12 9:49:31 >