Java class for renaming files for brasero cd-burning

[instantkarma]

hi,

I've had this glitch with brasero where when I burn mp3 cds brasero burns the files ordered by name and not by album/artist when the file is named in the "01-songname-artist" format. In essence, the actual song order on the cd will be "01-songname-artist", "01-songname-differentartist", "01-songname-thirdartist"..."02-songname-artist", "02-songname-differentartist", "02-songname-thirdartist" and so on and albums that you would want to play consecutively - don't. The solution to this issue was to simply rename the beginning of the file title by adding a prefix composed of aphabetical characters. That way the songs are burned in order of artist/album (as brasero burns according to alphabetical order) i.e. "prefix1-01-songname-artist", "prefix1-02-songname-artist", "prefix1-03-songname-artist"..."prefix2-01-songname-artist", "prefix2-02-songname-artist", "prefix2-03-songname-artist" and so on.

I wrote a script in Java that automates this for you:

import java.io.Console;
import java.io.File;
import java.io.IOException;

public class FileRename {

	/**
	 * @param args
	 * @throws IOException
	 */
	public static void main(String[] args) {
		if (args.length < 1) {
			System.err.println("Error: No directory was chosen.");
			System.exit(0);
		}
		File dir = new File(args[0]);
		File[] listFiles = dir.listFiles();
		Console c = System.console();
		int length = 3;
		if (args.length == 2) {
			try {
				length = Integer.parseInt(args[1]);
			} catch (Exception e) {
				System.out.println("Invalid length value given. use default? y/n");
				String ans = c.readLine();
				c.flush();
				if (!ans.equals("y")){
					System.exit(0);
				}
			}
		}
		while (listFiles[0].isDirectory()) {
			dir = listFiles[0];
			listFiles = dir.listFiles();
		}
		for (File f : listFiles) {
			if (f.getName().endsWith("3")) {
				f.renameTo(new File(f.getParent() + "/"
						+ dir.getName().substring(0, length) + "_"
						+ f.getName()));
			}
		}
		
	}

}

say, your much needed to be renamed mp3s are in your "/home/<username>/Music/<artist>" directory then all you do is:

java FileRename "/home/<username>/Music/<artist>"

and your mp3 files are prefixed with the first 3 letters of the <artist>'s folder's name.


I'd appreciate any sort of feedback on this.

[manualqr]

Nice work!
Could you provide the code in an attachment (FileRename.java)?

[instantkarma]

Nice work!
Could you provide the code in an attachment (FileRename.java)?

of course, just change the .txt to .java.

Any ideas about code design/efficiency much appreciated.